Rigorous peer-reviews are the basis of high-quality academic publishing. Thanks to the great efforts of our reviewers, Biologics was able to maintain its standards for the high quality of its published papers. Thanks to the contribution of our reviewers, in 2021, the median time to first decision was 22 days and the median time to publication was 49 days. The editors would like to extend their gratitude and recognition to the following reviewers for their precious time and dedication, regardless of whether the papers they reviewed were finally published:
| Adeel Malik | José Alberto Molina-Tijeras |
| Agnieszka Ulatowska-Jarża | José Manuel Pérez De La Lastra |
| Alexis Galanis | Leonid Pavlovich Churilov |
| Amulya Yaparla | Marcelo Sousa Silva |
| Anannya Bhattacharya | Marek Kieliszek |
| Andrea Berenyiova | Maria Angeles Rojo |
| Andrea Caporale | Marieann Högman |
| Andrew Norris | Marika Massaro |
| Angus C. Jackson | Markus Mandl |
| Anna Florowska | Martin Heßling |
| Antimo Di Maro | Martin M. Edreira |
| Apurba Krishna Bhattacharjee | Matthew Taylor |
| Ariane Rozza | Michael Dean |
| Basanth Eedara | Mihalj Poŝa |
| Beatrice Casini | Minki Sung |
| Benjamin Noto | Monika Wojciechowska |
| Chia-Jung Chang | Nadia Mulinacci |
| Christian Setz | Nicholas Sadgrove |
| Corina Paul | Nirit Bernstein |
| Danuta Witkowska | Norbert Kiss |
| Davide Bertelli | Olga S. Sokolova |
| Eduardo Cilli | Patrick A. Ball |
| Elodie Monchatre-Leroy | Pedro Ferreira-Santos |
| Emilien Jeannot | Philippe Guerre |
| Fany Reffuveille | Remigiusz Bąchor |
| Fernanda Rodrigues | Robert C. Ferrier |
| Franciszek Główka | Rubén Martín-Escolano |
| Gábor Ternák | Sara Linden |
| Gabriele Caviglioli | Sena Bluemel |
| Gaetano Gallo | Sergey G. Klochkov |
| Hongliang He | Seth Pincus |
| Hyemee Kim | Skadi Lau |
| Hyun Jin Choi | Takashi Misawa |
| Jaroslav Šebestík | Tamer Sharafeldin |
| Jerzy Juśkiewicz | Vrba Jiri |
| Jesus Calvo-Castro | Yoshiyuki Mishima |
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