A digitally colorized scanning electron microscopic (SEM) image depicts a single, red colored H9-T cell that had been infected by numerous, spheroid shaped, mustard colored human immunodeficiency virus (HIV) particles attached to the cell’s surface membrane, as seen in this 2012 image obtained from the National Institute of Allergy and Infectious Diseases (NIAID) located in Bethesda, Maryland, U.S., on March 5, 2019. Courtesy National Institute of Allergy and Infectious Diseases (NIAID)/Handout via REUTERS