**Figure 1.**
Number of confirmed/recovered/active and death cases in the US compared to the global cases: (**a**) linear scale; (**b**) logarithmic scale.

**Figure 1.**
Number of confirmed/recovered/active and death cases in the US compared to the global cases: (**a**) linear scale; (**b**) logarithmic scale.

**Figure 2.**
Confirmed cases growth rate in (**a**) US; (**b**) Jordan; (**c**) Italy.

**Figure 2.**
Confirmed cases growth rate in (**a**) US; (**b**) Jordan; (**c**) Italy.

**Figure 3.**
Number of confirmed/recovered/active and death cases in Jordan compared to the global cases: (**a**) linear scale; (**b**) logarithmic scale.

**Figure 3.**
Number of confirmed/recovered/active and death cases in Jordan compared to the global cases: (**a**) linear scale; (**b**) logarithmic scale.

**Figure 4.**
Number of confirmed/recovered/active and death cases in Italy compared to the global cases: (**a**) linear scale; (**b**) logarithmic scale.

**Figure 4.**
Number of confirmed/recovered/active and death cases in Italy compared to the global cases: (**a**) linear scale; (**b**) logarithmic scale.

**Figure 5.**
Linear Regression Model.

**Figure 5.**
Linear Regression Model.

**Figure 6.**
SIR (Susceptible, Infected, and Removed) Model Components.

**Figure 6.**
SIR (Susceptible, Infected, and Removed) Model Components.

**Figure 7.**
Linear regression model results for (**a**) confirmed cases; (**b**) death cases, and (**c**) new cases in the US.

**Figure 7.**
Linear regression model results for (**a**) confirmed cases; (**b**) death cases, and (**c**) new cases in the US.

**Figure 8.**
Linear regression model results for (**a**) confirmed cases, (**b**) death cases; and (**c**) new cases in Jordan.

**Figure 8.**
Linear regression model results for (**a**) confirmed cases, (**b**) death cases; and (**c**) new cases in Jordan.

**Figure 9.**
Linear regression model results for (**a**) confirmed cases, (**b**) death cases, and (**c**) new cases in Italy.

**Figure 9.**
Linear regression model results for (**a**) confirmed cases, (**b**) death cases, and (**c**) new cases in Italy.

**Figure 10.**
Exponential Regression Models for (**a**) Confirmed Cases; (**b**) Death Cases; (**c**) New Cases in US.

**Figure 10.**
Exponential Regression Models for (**a**) Confirmed Cases; (**b**) Death Cases; (**c**) New Cases in US.

**Figure 11.**
Exponential Regression Models for (**a**) Confirmed Cases; (**b**) Death Cases; (**c**) and New Cases in Jordan.

**Figure 11.**
Exponential Regression Models for (**a**) Confirmed Cases; (**b**) Death Cases; (**c**) and New Cases in Jordan.

**Figure 12.**
Exponential Regression Models for (**a**) Confirmed Cases; (**b**) Death Cases; and (**c**) New Cases in Italy.

**Figure 12.**
Exponential Regression Models for (**a**) Confirmed Cases; (**b**) Death Cases; and (**c**) New Cases in Italy.

**Figure 13.**
SIR Models Prediction for Susceptible, Recovered, and Infected Cases: (**a**) Italy; (**b**) US; and (**c**) Jordan.

**Figure 13.**
SIR Models Prediction for Susceptible, Recovered, and Infected Cases: (**a**) Italy; (**b**) US; and (**c**) Jordan.

**Figure 14.**
Confirmed case prediction for 24th of August 2020 using the Linear, Exponential Regression, and Exponential Smoothing models in Italy, Jordan, and US.

**Figure 14.**
Confirmed case prediction for 24th of August 2020 using the Linear, Exponential Regression, and Exponential Smoothing models in Italy, Jordan, and US.

**Figure 15.**
New case prediction for 24th of August 2020 and zero new case prediction using the linear, exponential regression, and exponential smoothing models in Italy, Jordan, and the US.

**Figure 15.**
New case prediction for 24th of August 2020 and zero new case prediction using the linear, exponential regression, and exponential smoothing models in Italy, Jordan, and the US.

**Figure 16.**
Death case prediction for 24th of August 2020 and zero case prediction using the linear, exponential regression, and exponential smoothing models in Italy, Jordan, and the US.

**Figure 16.**
Death case prediction for 24th of August 2020 and zero case prediction using the linear, exponential regression, and exponential smoothing models in Italy, Jordan, and the US.

**Table 1.**
Linear Regression Results for Confirmed, New, and Death Cases for Italy, US, and Jordan.

**Table 1.**
Linear Regression Results for Confirmed, New, and Death Cases for Italy, US, and Jordan.

Country | Italy | Jordan | US |
---|

Model Formula | Forecast Indicator * (Day of Date + Intercept) |

Cases | Confirmed Cases | New Cases | Death Cases | Confirmed Cases | New Cases | Death Cases | Confirmed Cases | New Cases | Death Cases |

SSE (sum squared error): | 3.3344 × 10^{11} | 1.21758 × 10^{9} | 1.05497 × 10^{7} | 1.31218 × 10^{6} | 15846.4 | 12.5244 | 1.94177 × 10^{13} | 2.05371 × 10^{10} | 1.50322 × 10^{8} |

MSE (mean squared error): | 1.58781 × 10^{9} | 5.79801 × 10^{6} | 50236.4 | 6278.39 | 89.0245 | 0.0599252 | 9.24653 × 10^{10} | 9.77958 × 10^{10} | 715821 |

R-Squared: | 0.846173 | 0.0188468 | 0.0227448 | 0.973442 | 0.331823 | 0.0072726 | 0.947582 | 0.661348 | 0.0280926 |

Standard error: | 39847.3 | 2407.91 | 224.135 | 79.2363 | 9.43528 | 0.244796 | 304081 | 9889.18 | 846.062 |

p value | <0.0001 | 0.0458767 | 0.000109 | <0.0001 | <0.0001 | 0.217336 | <0.0001 | <0.0001 | 0.0145537 |

**Table 2.**
Future Prediction Numbers Using Linear Regression Models for Italy, Jordan, and US.

**Table 2.**
Future Prediction Numbers Using Linear Regression Models for Italy, Jordan, and US.

Country | Italy | Jordan | US |
---|

Confirmed Cases | Prediction (the prediction is made for 24 August 2020) | 247,984 | 1401 | 4,061,952 |

**First zero** | Not Available | Not Available | Not Available |

New Cases | **Prediction** | 1197 | 18 | 38,220 |

**First zero** | 17th of August 2020 | Not Applicable | Not Applicable |

Death Cases | **Prediction** | 119 | Zero | Zero |

**First zero** | Not Available | Started on 9th of April 2020 | 18th of July 2020 |

**Table 3.**
Exponential Regression Results for Confirmed, New, and Death Cases in Italy, US, and Jordan.

**Table 3.**
Exponential Regression Results for Confirmed, New, and Death Cases in Italy, US, and Jordan.

Country | Italy | Jordan | US |
---|

Model Formula | Forecast Indicator Day of Date + intercept) |

Cases | Confirmed Cases | New Cases | Death Cases | Confirmed Cases | New Cases | Death Cases | Confirmed Cases | New Cases | Death Cases |

SSE (sum squared error): | 1240.22 | 311.656 | 308.051 | 265.67 | 59.9513 | 0.498341 | 1279.86 | 826.514 | 484.552 |

MSE (mean squared error): | 6.17027 | 1.80148 | 1.71139 | 1.57201 | 0.379438 | 0.0996681 | 6.09456 | 4.49193 | 3.64325 |

R-Squared: | 0.534905 | 0.0042252 | 0.0093464 | 0.537175 | 0.0507974 | 0.273939 | 0.751734 | 0.47227 | 0.114924 |

Standard error: | 2.484 | 1.34219 | 1.3082 | 1.2538 | 0.615986 | 0.315703 | 2.46872 | 2.11942 | 1.90873 |

p value | <0.0001 | 0.392753 | 0.194185 | <0.0001 | 0.0041635 | 0.227987 | <0.0001 | <0.0001 | <0.0001 |

**Table 4.**
Future Prediction Numbers using Exponential Regression Models for Italy, Jordan, and US.

**Table 4.**
Future Prediction Numbers using Exponential Regression Models for Italy, Jordan, and US.

Country | Italy | Jordan | US |
---|

**Confirmed Cases** | **Prediction (done on 24 August 2020)** | 247,984 | 1401 | 4,061,952 |

**First zero** | Not Applicable | Not Applicable | Not Applicable |

**New Cases** | **Prediction** | 1197 | 18 | 38,221 |

**First Zero** | 26 July 2020 | Not Applicable | Not Applicable |

**Death cases** | **Prediction** | 119 | Zero | Zero |

**First Zero** | Not Applicable | Zero Since 2nd May 2020 | 12th July 2020 |

**Table 5.**
Forecasting Results for Confirmed Cases using the Exponential Smoothing Model.

**Table 5.**
Forecasting Results for Confirmed Cases using the Exponential Smoothing Model.

Forecast Forward | 65 Days (21st June 2020–24th of August 2020) |
---|

Forecast Based on | 22nd of February 2020–20th of June 2020 |
---|

| Initial | Change from Initial | Seasonal Effect | Contribution |
---|

Country | 21st of June 2020 | 21st of June 2020–24th of August 2020 | High | Low | Trend | Season | Quality |
---|

**Jordan** | 1022 | ± | 1.8% | 37.1% | 100.0% | 100.0% | 0.0% | OK |

**Italy** | 238,505 | ± | 0.7% | 4.2% | 100.0% | 100.0% | 0.0% | Good |

**US** | 2,279,626 | ± | 0.5% | 78.2% | 100.0% | 100.0% | 0.0% | Good |

**Table 6.**
Forecasting Results for New Cases using the Exponential Smoothing Model.

**Table 6.**
Forecasting Results for New Cases using the Exponential Smoothing Model.

Forecast Forward | 65 Days (21st of June 2020–24th of August 2020) |
---|

Forecast Based on | 22nd February 2020–20th of June 2020 |
---|

| Initial | Change from Initial | Seasonal Effect | Contribution |
---|

Country | 21st of June 2020 | 21st of June 2020–24th of August 2020 | High | Low | Trend | Season | Quality |
---|

**Jordan** | 18 | ± | 103.8% | 0.0% | None | | 0.0% | 0.0% | Poor |

**Italy** | 395 | ± | 490.7% | 202.6% | 14th August 2020 | 57.2% | 17th of August 2020 | −116.1% | 0.0% | 10.0% | Ok |

**US** | 38,221 | ± | 39.1% | 0.0% | None | 0.0% | 0.0% | Poor |

**Table 7.**
Forecasting Results for Death Cases using the Exponential Smoothing Model.

**Table 7.**
Forecasting Results for Death Cases using the Exponential Smoothing Model.

Forecast Forward | 65 days (21st of June 2020–24th of August 2020) |
---|

Forecast Based on | 22nd of February 2020–20th of June 2020 |
---|

| Initial | Change from Initial | Seasonal Effect | Contribution |
---|

Country | 21st of June 2020 | 21st of June 2020–24th of August 2020 | High | Low | Trend | Season | Quality |
---|

**Jordan** | 0 | ± | 156,004.5% | 0.0% | None | None | 0.0% | 0.0% | Poor |

**Italy** | 45 | ± | 293.7% | 173.6% | None | None | 100% | 0.0% | Poor |

**US** | 170 | ± | 266.9% | −541.6% | August 19 | −16.8% | 16th of August 2020 | 49.1% | 80.2% | 19.8% | Ok |

**Table 8.**
Future Forecasting using the Exponential Smoothing Model for Italy, Jordan, and US.

**Table 8.**
Future Forecasting using the Exponential Smoothing Model for Italy, Jordan, and US.

Country | Italy | Jordan | US |
---|

**Confirmed Cases** | **Prediction** | 248,616 | 1427 | 4,180,774 |

**First zero** | Not Applicable | Not Applicable | Not Applicable |

**New Cases** | **Prediction** | Zero | Poor Model | Poor Model |

**First Zero** | 6th of July 2020 | Poor Model | Poor Model |

**Death Cases** | **Prediction** | Poor Model | Poor Model | Zero |

**First Zero** | Poor Model | Poor Model | 5th of July 2020 |

**Table 9.**
Future Forecasting using the SIR Model for Italy, Jordan, and US.

**Table 9.**
Future Forecasting using the SIR Model for Italy, Jordan, and US.

**Country** | **Italy** | **Jordan** | **US** |
---|

Susceptible | **Prediction (****done on 24th of August 2020)** | 21,629,365 | 5,701,847 | 71,555,047 |

**First zero** | Not Applicable | Not Applicable | Not Applicable |

Infected | **Prediction** | Zero | 20 | Zero |

**First Zero** | 10th of June 2020 | 20th of August 2020 | 1st of August 2020 |

Recovered | **Prediction** | 38832460 | 4501872 | 256645000 |

**First Zero** | 21,629,365 | 5,701,847 | 71,555,047 |

**Table 10.**
Future Forecasting Using Linear, Exponential, and Exponential Smoothing Models in Italy, Jordan, and US.

**Table 10.**
Future Forecasting Using Linear, Exponential, and Exponential Smoothing Models in Italy, Jordan, and US.

| Linear Regression | Exponential Regression | Exponential Smoothing |
---|

| | Italy | Jordan | US | Italy | Jordan | US | Italy | Jordan | US |
---|

**Confirmed Cases** | Prediction (The prediction is done on 24th of August 2020 | 247,984 | 1401 | 4,061,952 | 247,984 | 1401 | 4,61,952 | 248,616 | 1427 | 4,180,774 |

First zero | NA | NA | NA | NA | NA | NA | NA | NA | NA |

**New Cases** | Prediction | 1,197 | 18 | 38,220 | 1197 | 18 | 38,221 | Zero | Poor Model | Poor Model |

First Zero | 17th of August 2020 | NA | NA | 26th of July 2020 | NA | NA | 6 the of July 2020 | Poor Model | Poor Model |

**Death Cases** | Prediction | 119 | Zero | Zero | 119 | Zero | Zero | Poor Model | Poor Model | Zero |

First Zero | NA | 9th of April 2020 | 18th of July 2020 | NA | 2nd of May 2020 | 12th of July 2020 | Poor Model | Poor Model | 5th of July 2020 |