1. WHO-Director-General's Opening Remarks at the Media Briefing on COVID-19. https://www.who.int/dg/speeches/detail/who-director-general-s-opening-remarks-at-the-media-briefing-on-covid-19-Date: 11 March 2020.
2. Clinical, Serological, whole genome sequence analyses to confirm SARS-CoV-2 reinfection in patients from Mumbai, India;Shastri;Front Med (Lausanne),2021
3. Direct observation of repeated infections with endemic coronaviruses;Galanti;J Infect Dis,2020
4. The Tecumseh study of respiratory illness. VI. Frequency of and relationship between outbreaks of coronavirus infection;Monto;J Infect Dis,1974
5. Rapid decay of anti-SARS-CoV-2 antibodies in persons with mild covid-19;Ibarrondo;N Engl J Med,2020