1. W. H. Organization, weekly operational update on COVID-19. https://www.who.int/publications/m/item/weekly-epidemiological-update-on-covid-19-31-march-2021
2. W. H. Organization. https://www.who.int/emergencies/diseases/novel-coronavirus-2019/covid-19-vaccines
3. Ahsan W, Javed S, Bratty MA, Alhazmi HA, Najmi A (2020) Treatment of SARS-CoV-2 novel coronavirus: how far have we reached? Drug DiscovTher 14:67–72
4. Richardson P, Griffin I, Tucker C, Smith D, Oechsle O, Phelan A, Stebbing J (2020) Current challenges of the 2019-COVID pandemic: where we started, where we are, and where do we go? Lancet 395:30–31
5. Kouznetsov VV (2020) Eur J Med Chem 203:112647