FILE PHOTO: An undated photo shows a 3-D print of a SARS-CoV-2 particle, also known as novel coronavirus, the virus that causes COVID-19. NIH/Handout via REUTERS.
FILE PHOTO: An undated photo shows a 3-D print of a SARS-CoV-2 particle, also known as novel coronavirus, the virus that causes COVID-19. NIH/Handout via REUTERS.