This electron microscope image provided by the National Institutes of Health shows human respiratory syncytial virus (RSV) virions, colorized blue, and anti-RSV F protein/gold antibodies, colorized yellow, shedding from the surface of human lung cells. Americans 60 and older can get a new RSV vaccine but should discuss it with their doctor first, U.S. health officials recommended Thursday, June 29, 2023. (National Institute of Allergy and Infectious Diseases, NIH via AP, File)