FILE PHOTO: A scientist examines COVID-19 infected cells during research for a vaccine against the coronavirus disease at a laboratory in Saint Petersburg

FILE PHOTO: A scientist examines COVID-19 infected cells during research for a vaccine against the coronavirus disease at a laboratory in Saint Petersburg

FILE PHOTO: A scientist examines COVID-19 infected cells during research for a vaccine against the coronavirus disease (COVID-19) at a laboratory of BIOCAD biotechnology company in Saint Petersburg, Russia May 20, 2020. REUTERS/Anton Vaganov/File Photo