FILE – This 2003 electron microscope image made available by the Centers for Disease Control and Prevention shows mature, oval-shaped monkeypox virions, left, and spherical immature virions, right, obtained from a sample of human skin associated with the 2003 prairie dog outbreak. British health officials said they cannot tell if the spread of monkeypox has peaked in the country as they announced another 45 cases Friday, June 10, 2022. That makes for a total of 366 cases in the biggest-ever outbreak of the disease beyond Africa. (Cynthia S. Goldsmith, Russell Regner/CDC via AP, File)