Markovski, Velo. “IMMUNE RESPONSE TO COVID-19 COMPARED TO THE IMMUNE RESPONSE TO SARS, MERS AND INFLUENZA”. PROBLEMS of Infectious and Parasitic Diseases 48, no. 2 (October 15, 2020): 11–14. Accessed April 1, 2025. https://pipd.ncipd.org/index.php/pipd/article/view/48-2-2_immune_response_to_covid-19_compared.