An Optimized Decision Support Model for COVID-19 Diagnostics Based on Complex Fuzzy Hypersoft Mapping

: COVID-19 has shaken the entire world economy and affected millions of people in a brief period. COVID-19 has numerous overlapping symptoms with other upper respiratory conditions, making it hard for diagnosticians to diagnose correctly. Several mathematical models have been presented for its diagnosis and treatment. This article delivers a mathematical framework based on a novel agile fuzzy-like arrangement, namely, the complex fuzzy hypersoft ( C FH S ) set, which is a formation of the complex fuzzy (CF) set and the hypersoft set (an extension of soft set). First, the elementary theory of C FH S is developed, which considers the amplitude term (A-term) and the phase term (P-term) of the complex numbers simultaneously to tackle uncertainty, ambivalence, and mediocrity of data. In two components, this new fuzzy-like hybrid theory is versatile. First, it provides access to a broad spectrum of membership function values by broadening them to the unit circle on an Argand plane and incorporating an additional term, the P-term, to accommodate the data’s periodic nature. Second, it categorizes the distinct attribute into corresponding sub-valued sets for better understanding. The C FH S set and C FH S -mapping with its inverse mapping (INM) can manage such issues. Our proposed framework is validated by a study establishing a link between COVID-19 symptoms and medicines. For the COVID-19 types, a table is constructed relying on the fuzzy interval of [ 0,1 ] . The computation is based on C FH S -mapping, which identiﬁes the disease and selects the optimum medication correctly. Furthermore, a generalized C FH S -mapping is provided, which can help a specialist extract the patient’s health record and predict how long it will take to overcome the infection.


Introduction
COVID-19 marked itself on the world's map at the end of 2019 in the Hunan Seafood market of Wuhan district (Hubei, China) [1].After a few days, deep sequencing analysis of the samples taken from the infected patients' lower respiratory tract led to identifying a novel virus that belonged to the Severe Acute Respiratory Syndrome.From there, it was given the name SARS-CoV-2 and was found to be the infection-causing agent of the pneumonia clusters observed in the infected patients [2].The coronavirus family is thought to be the cause of sickness in both animals and humans, according to [3].A total of seven family members of the Coronavirus family can produce infection in humans.The most common infection causative agents in humans out of these viruses are namely: 229E, HKU1, NL63, and OC43 [1].
Machine learning and deep learning methods are widely used for COVID-19 diagnostics (see, for example, [4][5][6]), severity prediction [7], and spread prediction [8,9].The overview of these methods can be found in review papers [10,11].Fuzzy-logic-based methods have also been applied extensively for disease diagnostics with various examples ranging from advice on the common cold [12] to Huntington's disease [13].
Conventional methods are insufficient to solve multidimensional challenges in the environment, economics, engineering, and robotics.The four theories discussed here that specialize in solving these types of problems include the fuzzy set theory Zadeh [14], interval mathematics [15], the probability set theory [16], and the rough set theory Pawlak [17].They are widely used in various fields such as statistics, machine learning, and artificial intelligence.Liu et al. [18] characterized the concept of a correlation coefficient between hesitant fuzzy sets and applied it for medical diagnoses.Molodtsov [19] showed that soft set (SS) theory has significant applications in the fields of data mining, medical imaging, Riemann integration, game theory, and pattern recognition.Soft sets were initially deployed by Maji et al. [20] to handle judgment call dilemmas.S-sets and associated variants are relevant according Yang et al. [21].The paradigm of imprecise SS and its various forms was established by Maji et al. [22].Kharal et al. [23,24] established the concepts of mappings on fuzzy soft subclasses and soft classes.They deployed examples and empirical evidence to explore the preservation of the image of fuzzy soft sets and soft sets.In [25], Karaaslan investigated the word smooth class and its relevant functions.Alkhazaleh et al. [26] developed the concepts of a mapping on classes and categorised neutrosophic soft set collections into single-valued neutrosophic classes and also explored and identified a single-valued neutrosophic image and neutrosophic soft images of neutrosophic soft sets.Ropiak [27] combined rough set based granular computing with deep learning methods, which allowed for the improvement of knowledge extraction.
The notion of mappings over collections of multifunctional fuzzy soft sets was pioneered by Sulaiman et al. [28].They focused on a few factors linked to the image and INI of multi-aspect fuzzy soft sets and demonstrated their findings with numerical examples.The concept of mappings between picture fuzzy soft sets and an intuitionistic fuzzy soft set and INI was defined by Bashir and Salleh [29].
Samarandache [30] offered the fuzzified hypersoft (FHS) and hypersoft sets (HS) as modifications of fuzzy soft and soft settings.Saeed et al. [31][32][33][34], Zulqarnain et al. [35], Martin et al. [36], Musa et al. [37], Ajay et al. [38], and Debnath et al. [39] discussed the basics of the HS and their entire mappings in an HS environment, as well as their exposition of the HS in object classification, cell imaging, and multi-eligibility requirements.Ramot et al. [40] proposed an extensive analysis of the mathematical properties of the CF set.Elementary predetermined operations on CF sets were studied, including CF complement, union, and intersection.Thirunavukarasu et al. [41] examined the intuitive understanding of a soft CF set's aggregation operation.They also illustrated uses for consolidation techniques, demonstrating that the approach may be successfully used in a wide range of circumstances including uncertainty and periodicities.In 2020, Rahman et al. [42] combined two major theories complex set and hypersoft set in a fuzzy setting: a sophisticated neutrosophic set, and a complex intuitionistic imprecise information given to build hypersoft mixtures.
The paradigm of a complex multi-fuzzy collection, which is a fusion of CF collections and multi-fuzzy defines, was established by Al-Qudah et al. [43].Their developed scheme would indeed be equipped to deal with instabilities, ambiguities, and evaluation based of two-dimensional cross inputs by continuously storing the magnitude and P-terms of the C-numbers.
The main objective of this study is to simulate a feasible type of situation of COVID-19-specific diagnosis, as well as to ensure an effective treatment because it is difficult to distinguish other upper-respiratory infections from COVID-19 using existing theoretical and empirical models and techniques [23,24,44,45] because these techniques are restrained from finalizing configurations.The above mentioned strategies are inadequate to thoroughly assess the data to gain a more substantial insight and correct diagnosis.To remedy this defect, these foundations are coupled into a multifaceted system composed of a fuzzy output and a hypersoft (HS) setting.
This approach is far more flexible in two main ways.To continue, it extends the C F H S to obtain a new term 'P-term' to support the statement's reoccurring aspect, permitting a broad range of weighted parameters.They cannot keep up in two-dimensional quantities to the unit circle in an image plane.Furthermore, the C F H S traits can be further grouped into sub-values to enhance explanation.A mapping is a correlation between the two or more segments which is handled by guidelines that transfer an embedding feature to its underpinning normative considered appropriate predicated on subsystem and subsurface properties.This tool enables comparable inputs to be treated by a single basic value.The goal of the research is to investigate COVID-19 treatments in the community, as well as the manifestations that correlate with them.It is impossible to discern which characteristic of COVID-19 is causing issues and how substantial it is after gazing at the COVID-19 health consequences.To reduce this issue, the C F H S set and C F H S -mapping with its INM are often used.
When linked with scientific modelling, these concepts are effective and crucial for appropriately addressing the issues.A table based on the fuzzy region among [0, 1] is constructed for the diverse strains of COVID-19.The approaches rely on C F H S -mapping and would be used to create an index that indicates the ailment and then decides the correct diagnosis.In addition, a detailed C F H S -mapping , which will support a practitioner in estimating the time before the symptoms are alleviated, is established.
The main contributions and the advantages of the proposed method can be summarized as follows: 1.
The adopted C F H S model is more flexible and consistent as compared to existing fuzzy soft set-like models because it is capable of managing the following limitations of the existing literature collectively as a single model: It tackles first issue by assigning a fuzzy membership grade to each alternative corresponding to parameters, the second by considering phase and amplitude terms, and the third and fourth by considering the hypersoft setting.Thus it leads to constructing a reliable decision support system by addressing these issues collectively.

2.
An M A DM intelligent algorithm is proposed that aims to support problem-solving for an early assortment of alternatives and identify sufferers with conflicting medical indications.

3.
This exploration demonstrates a well-built association between the signs and mathematically records them to ample concern.The scheme is assembled on trimming C F H S set designs that can predict a patient's state and estimate medical indications over time to analyze a medicine's health effects.It can be carried out to foresee the contagion's reinfection parameters in anticipation that the infection is cured.In the upcoming outlook, such pattern recognition-based algorithms are proposed to diminish medical inaccuracies and receive inspiring results depending on various patient configurations.
The article is presented in the following manner: Section 2 highlights the concept of complex fuzzy hypersoft classes.image The opted approach is validated by practically applying it to a problem with comparative analysis in Section 3, while the conclusion sums up the study in the Section 4.

Implementation of C F H S Set for COVID-19
This section's primary focus is to analyze the highlighted problem related to COVID-19.The analysis is based on the cause of the disease, its symptoms, diagnosis, and treatment of patients.C F H S mapping and inverse mapping are applied for precise and accurate analysis and suggest a procedure policy purely based on mathematical strategies presented in this article.

COVID-19 and Its Variants
With the passage of time, scientists have identified numerous variants of COVID-19 as it has evolved.There are many distinct forms of coronaviruses, but just four are discussed below.
The first is SARS, also known as Severe Acute Respiratory Syndrome, whose causative agent also belongs to the coronavirus family.The SARS-CoV virus has a zoonotic origin, targets the lungs, and causes acute respiratory problems.It was the first virus whose virology or genetic sequence was remotely similar to the COVID-19 virus upon the first examination.
SARS-CoV-2 or COVID-19 is responsible for the pandemic that started back in 2019.As explained in the introduction, it also hinders respiratory functions and is renowned as the successor of the SARS-CoV-1 virus by the US National Institutes of Health.
MERS, or Middle Eastern Respiratory Syndrome, also belongs to the coronavirus family.It first presented itself in the Middle Eastern countries of Asia around 2012, and it is called MERS or the Camel Flu.Its symptoms are quite similar to those of the COVID-19 virus, but the most prominent are mild to high fever, shortness of breath, diarrhea, and cough.MERS is regarded as more severe when compared with other diseases.
The OC43(HCoV-OC43) strain of the human coronavirus is a component of the COVID family and belongs to a group of viruses called the Betacoronavirus 1.This strain is prominent in infecting humans and cattle.As far as the virus's structural integrity goes, it is a simple-stranded RNA, positive-sense, enclosed virus.It is also one of those viruses of the coronavirus family that affects humans out of the seven strains.Its host-entering mechanism involves binding with the N-acetyl-9-O-acetylneuraminic acid receptor of the host cell.
These are the specific symptoms associated with these problems: loss of speech or movement, chest pain or pressure, difficulty breathing or shortness of breath, loss of taste or smell, headache, diarrhea, sore throat, aches and Pain, tiredness, dry cough, and fever.
An algorithm based on C F H S -mapping is proposed to diagnose COVID-19, suggest appropriate treatments, and track the treatment steps and improvement measures for the patients.

Preliminaries
This portion provides a few basic concepts to facilitate the readers for clear understanding proposed approach.

Definition 2 ([19]
).An SS is stated as the family of pairs ( ô, ζ( ô)) where ζ : Ξ → P( Θ) with ζ( ô), Ξ, and P( Θ) as an ô-approximate member of SS, a set of evaluating indicators and the family of subsets of Θ, respectively.Definition 3 ([41]).Let say Θ and Π are the initial universal set and attributes, respectively.For any g ∈ Π, let F ⊆ Π and (ϕ, F) be a CF soft set over Θ.Then, a CF soft set (ϕ, F) is subjected to Θ, which is specified by a function ϕ F that represents a mapping ϕ F : F → C( Θ).Here, ϕ F is known as CF approximate function of the CF soft set, and it can be signified as

Methodology
This section aims to describe the various stages of complete methodology that are adopted for this study.The Figure 1 presents the graphical view of complete methodology adopted in this study.

Description of Fuzzy Rules
In accordance with the terminological understanding of "fuzzy rule", the following criteria have been employed to justify fuzzy rule requirements: 1.
Consideration of linguistic variables: The linguistic variables are taken as fuzzy input and their corresponding linguistic variable are taken as fuzzy output.

2.
Employment of membership function: In this proposed approach, a novel function called multi-argument approximate function is employed which considers the Cartesian product of sub-parametric valued disjointed classes corresponding to parameters as its domain and the collection of complex fuzzy sets as its co-domain.In other words, this function has sub-parametric tuples having multi-argument coordinates.It is the modified version of approximate function used in a soft set.It ensures the entitlement of the hypersoft setting with provision of due status to parameters and their sub-parametric values in the form of disjointed classes.Table 1 presents the comparison of the adopted membership function with other existing membership functions.

3.
Designing of fuzzy-valued-based rules: In this step, construction and computation of the relevant fuzzy system are involved.4.
Observation of fuzzy-valued-based output: This step is meant for obtaining the optimum decision.COVID-19 patients show similar symptoms to the sickness caused by the viruses listed above, making it hard to pinpoint the cause of the ailment and propose an appropriate treatment for the disease.This ambiguity and vagueness are dealt with by using C F H S in a specialized manner.To translate oral data into numerical language, a fuzzy interval [0, 1] is constructed for various types of COVID.A chart is created to find the actual form of COVID from its different types; see Table 2.

SARS-CoV
Diseases are known to progress over time, so this paper will utilize this fact by collecting the patient's data for 2-3 days, comparing the symptoms and the side effects (if any) presented, leading to a complete workup of the patient's history.Further on, additional graphs regarding the present condition compared to the previous condition of the patients are created for better monitoring and trend identifying purposes.The above statement is expanded in Table 3 and Figure 2. Depending on the conditions of COVID, it is divided into a set of three ranges, namely serious, moderate, and low. Figure 2 defines the ranges along with the constraints allocated to these ranges.
Step 2. It is anticipated that B = { ˆ 1 , ˆ 2 , ˆ 3 , ..., ˆ w } a class having relevant indications and the their respective sub-classes are An C F H S set is constructed having weights proposed by decision-makers (health experts) after assessing the physical condition of the patient under observation over time ε.
Step 3. Now, mappings are defined as follows: λ : W → W and : where T s k are weights from z F that are connected.Get the image of z ε F by using the mappings σ and denoted as z F .
Step 5.Then, by making use of the information from Table 3, constitute a set after symptoms and assemble the pre-diagnosis table which leads to the assessment for consistency of the proposed study.
Step 6.Take the mean for each specific patient centred on their clinical manifestations.Now, compare our outcomes to the diagnosis Table 2. C by applying min-max composition over z F and χ F .Step 9. Use medications that offer additional benefits while having fewer side effects.To determine the patient's status, the guidelines are followed.

Computation
Algorithm 1: Cont.Output Step 10.Consider two mappings: λ : J q−1 → J q and λ : W q−1 → W q and : C q−1 → C q such that λ (∂ l ) = ∂ l and ( x ) = x .Then this mapping can be constructed in this mechanism: and can be regarded as: .. is the number of episodes of treatments.
Step 11.Continue step 10 whenever the outcomes need to be assessed and finally compute the score values by taking arithmetic mean of all final obtained values corresponding to each patient.

Methodological Limitations
Prior to the application of the algorithm above, the following limitations of the technique are checked: 1.
As the parameters described have the same base and structure, a mapping will be required to convert the criterion to its parameterized value.

2.
The two collections to be compared must belong to the same structural class of the C F H S set, and their composition must be independent of each other.

3.
By using the patient's history and medical records, the doctor should advise the best course of medication based on the symptoms presented by the disease.

4.
A database is required that comprises the ranges needed for the disease identification and mapping, which can be constructed with the assistance of a medical professional.

5.
If the proposed treatment method is leading to diverse effects on the patient, inverse C F H S -mapping is utilized to remove the adverse effects and restart the medication process all over again.

Experimental Study
The usage of the algorithm described above in a clinical situation is the main emphasis of this section.The patient's medical condition is first translated into mathematical syntax with the aid of medical personnel.The next step involves the comparison of the mathematical syntax of the patient with the syntax of the patients recorded in the database beforehand.The patient with distinct symptoms of COVID-19 is monitored with the help of a diagnostic map, and day-by-day reports can be seen in (Tables 2 and 3).These tables can be used for a comparative analysis to deduce the intensity of the disease on a particular patient.The most significant advantage of the algorithm is its use case for determining a particular disease based on its symptoms and severity using mapping functions.The algorithm can propose an optimal treatment method based on the disease based on the patient's condition.The technique's development will be aided by a fully generalized mapping of the physician's rehabilitation and convenient restoration graphs for clinical practice, retrospective cohort analysis, and application users.Four patients present similar symptoms making it complicated for medical professionals to suggest a diagnosis based on their overlapping symptoms.Many dynamics are considered, but some are ruled out for ease of explanation of the algorithm, such as the previous skin color changes, history, and other aspects.Based on the diagnosis presented by the algorithm and the doctor's intuition, a treatment method can be started along with the patient's rehabilitation plan.
The following example is performed on hypothetical data, but if real data is used, it can lead to fruitful results and help optimize the workflow in hospitals while minimizing human errors and misdiagnosis problems.
Compare Table 9 with Table 3 to obtain initial diagnosis and generate a diagnosis Table 10.This table is utilized to check the accuracy of the generated diagnosis.
Determine the average of all the aspects from Table 9 that correspond to each individual's symptoms.This can be seen in Table 11.The COVID chart (Table 2) is currently being compared to the  Step 7.
The doctor prescribes medicine after accurately assessing the true essence of each clinical condition.The C F H S set evolves based on critical specific suggestions, along with the adequate care for the different sorts of COVID.Suppose C = { 1 = Pfizer, 2 = Moderna, 3 = Novavax, 4 = AstraZeneca} be distinctive sustainable therapies, then χ F is established, which is a set of surgeon's advice for the effective treatments for COVID manifestations, and repurpose C F H S to fuzzy values using )ω z (s ) (∂) [46], with weights w 1 = 0.2, w 2 = 0.4 to obtain aggregation values.Table 12 contains χ F ∈ C F H S (W ).The assessment methods in Table 12 are determined depending on each patient's condition.
Step 8. Measure the C F H S union among both χ F , z F and collect the linkage among both predicted treatments and doctors as The prescription is pertinent for the patients because it generates more rewards while having low toxicity.Table 14 shows the best medicine dosages for each patient.From Table 14, the treatment 4 is most suitable for patient ∂ 1 , while one of the treatments among 1 , 3 , and 4 is to be advised for patient ∂ 2 ; for patient ∂ 3 the most suitable treatment is 1 , and the treatment 4 is the most suitable for patient ∂ 4 .The concluding position relies on the person's actual status, disease features, and disease.
Step 10.The individual's predicament is classified by the characteristics of ailments and the patient's condition.The incidences will repeat whenever illnesses are cured.By using C F H Smapping and creating mappings to assess the development of each patient; λ : W q−1 → W q and : and This is how the C F H S -mapping can be conveyed; The C F H S -mapping is underlying as; identify the number of remedies and rehabilitation exacerbations in Tables 15-18 for q = 2, 3, 4, 5.
Step 10 is reiterated until patients' targets are met.Figures 3-6 depict each patient's status update.In Table 19, the symbols and × are meant for YES and NO, respectively.Similarly, the features such as FMG stand for fuzzy membership grade, COP for "consideration of parameters", COSP for "consideration of sub-parameters", MOPND for "management of periodic nature of data" and REC for "ranking evaluation criteria".

Target Users of the Proposed Approach
The proposed algorithm aims to be a problem-solving support for early assortment alternatives and identifying sufferers with conflicting medical indications.This exploration demonstrates a well-built association between the signs and mathematically records them.The scheme is assembled on trimming C F H S set designs that can predict a patient's state and estimate medical indications over time to analyse the health effects of a medicine.It can be carried out to foresee the contagion's reinfection possibilities in anticipation of a cure.In their upcoming implementation, such pattern recognition-based algorithms are committed to diminishing medical inaccuracies and receiving inspiring results depending on various patient configurations.

Comparative Analysis
The concept of C F H S mapping is both broad and appropriate for various illnesses.Existing theories cannot be used to cope with and examine the challenges; however, our proposals do have their limits (Table 19).Because of such boundaries, some physicians may be incapable or unwilling to gather all the initial information.The presented method can transform the patient's condition into a quantitative style without gaps or overlaps, permitting us to secure the best diagnosis and treatment.The presented approach is compared to existing theories on structural and computational basis in Tables 19 and 20.When attributes are further split into attribute values and the concerns include complex (2D) data, current techniques fail to execute.The proposed mapping addresses these shortfalls.It reveals that, compared to conventional techniques, our framework is stable and effective in responding to such obstacles satisfactorily.Now, the recommended plan is discussed along with its comprehensive nature.
• Because the COVID diagnosed individual cannot be comprehensively assessed after the initial assessment, additional days are added to this approximation .All of the patient's facts are contained in the C F H S set, and its union and severity can be linked to symptoms.

•
In each patient trial, a relationship between related and critical indications can be determined, and weights assigned to them, which is crucial.The results will be non-specific if only the initial symptoms are considered.• A treatment method for the patients is suggested in the second stage of the algorithm based on their COVID type.As time passes, this model depicts the evolution of the disease.
• If an individual does not progress after that round, inverse C F H S -mapping is used to reinstate him to his initial state, and then the medications must be resumed from the beginning.• Under the influence of parameterizations, the proposed approach is helpful for many patients with various illnesses and multiform criteria.This research is comprehensive and coherent in dealing with concerns in the medical world and multi-criteria.

•
The data recorded by the medical personnel will be evaluated in the form of C F H S .The intensity of the effect and the time the patient has been sick are recorded in the form of a complex number, while the sub-parametric values of the attributes are taken in hypersoft structures.The data recorded is taken between 0 and 1, depending on the degree of % match.

•
This framework attempts to identify any illness's prognosis as well as their associated symptoms.By integrating these notions with a scientific prototype, these concepts can ve fully understand.This investigation demonstrates a relationship between symptoms and treatments, which simplifies the issue.The calculation relies on C F H S -mapping to correctly identify the disease and choose the most appropriate treatment for each patient.A generalized mapping is used to predict the physician's progression record and evaluate the spacing of rehabilitation until it is mitigated.Riaz et al. [56] Grey relational analysis (GRA) based on q-rung orthopair m-polar fuzzy soft set (q-RO-m-PFSS) 0.2854, 0.2825, 0.2820, 0.2921 4 > 1 > 2 > 3 Riaz et al. [56] TOPSIS based on q-rung orthopair m-polar fuzzy soft set (q-RO-m-PFSS) 0.5545, 0.5342, 0.5324, 0.6084 4 > 1 > 2 > 3 Proposed approach C F H S set 0.1124, 0.0640, 0.0230, 0.0020 1 > 2 > 3 > 4

Conclusions
COVID-19 and its associated complications have been discussed in this article.A technique is suggested for diagnosing the patient's primary symptoms and analyzing their COVID.As a result, the C F H S -mapping, INM and a few practical works with associated features are described.There are three stages to the calculation that have been established.The model examines the patients' actual COVID in the first stage.In the second step, C F H S -mapping was utilized to locate suitable medications for the patients depending on their COVID-19 severity.Thirdly, generalized mapping is developed for the patient's development.The system predicts which medication will best treat the patient until the patient achieves suitable immune response.By associating this approach with existing knowledge, the findings thus gained are precise, simple to cope with, and have outstanding flexibility to examine MCDM issues.Other zones of the Neutrosophic HS set, Plithogenic HS set, Plithogenic Intuitionistic Fuzzy HS set, Q-Rung Orthopair Fuzzy HS set and their gluing models are to be explored for developing flexible hybrid structures.It may also be adapted for intelligent machines, diagnostic devices, information retrieval, information processing, social bonding, personalized recommendation approaches, algorithms, media platforms, remote sensing, the macroeconomic paradigm, classification techniques, image recognition, virtual architecture, and probabilistic reasoning.
(a).Uncertainties involved in the approximation of alternatives.(b).Periodic nature of the data.(c).Consideration of sub-parametric values as disjointed classes.(d).Entitlement of multi-argument approximate function.

Figure 1 .
Figure 1.Pictographic view of various stages involved in adopted methodology.

Figure 2 .Algorithm 1 : 1 . i=1 F
Figure 2. Flowchart of various ranges related to COVID-19's mentioned criteria.2.4.Proposed Algorithm for Pre-Diagnosis of Patients Based on CFHS Mapping This section proposes a multi-attribute decision-making-based (M A DM ) algorithm (Algorithm 1) for pre-diagnosis of COVID-19 in patients who are under observation.

Step 7 .
Consider a class B = { ˆ 1 , ˆ 2 , ˆ 3 , ..., ˆ w } consists of symptoms which are correlated concurrently, where k = w ∏ i=1 |F i | and C = { 1 , 2 , 3 , ..., x } is a list of potential medicines, then it allows for constructing χ F , where χ is the C F H S function from F to W (C) that is the collection with recommendations of physician.Step 8. Obtain W 1

Table 1 .
Comparison of employed membership function with other membership functions.

Table 3 .
COVID is analysed using associated concerns and how they are treated on a daily basis.

Table 4 .
z 1 F : Symptoms from F on the first day of patient's treatment.

Table 5 .
z 2 F : Symptoms from F on the second day of patient's treatment.

Table 6 .
z ε F : C F H S union of z 1 F and z 2 F .

Table 7 .
z F : Scales assigned to each C F H S patient's clinical manifestations.

Table 9 .
Scores in the form of FHS set.

Table 10 .
Initial treatment chart is developed to assess the validity of the results.

Table 11 .
Personal information from patient significance levels related to clinical manifestations.

Table 12 .
χ F is represented in a tabular format: Doctor's advice for COVID symptoms and the appropriate treatment.

Table 13 .
W 1 C tabular representation: union of χ F and z F to investigate the affiliation for both envisaged treatments and patients.

Table 14 .
Data pertaining to suggested treatment is represented in a tabular format.

Table 15 .
W 2 C tabular representation: after the second therapy event, the patient's improvement report.

Table 16 .
W 3 C tabular representation: After the third therapy event, the patient's improvement report.

Table 17 .
W 4 C tabular representation: After the fourth therapy event, the patient's improvement report.

Table 18 .
W 5 C tabular representation: After the fifth therapy event, the patient's improvement report.

Table 19 .
The proposed C F H S is compared to established paradigms.