AP PROVIDES ACCESS TO THIS PUBLICLY DISTRIBUTED HANDOUT PHOTO PROVIDED BY THE CDC; MANDATORY CREDIT
This 2003 electron microscope image made available by the Centers for Disease Control and Prevention shows a monkeypox virion, obtained from a sample associated with the 2003 prairie dog outbreak. On Wednesday, May 18, 2022, Massachusetts has reported a rare case of monkeypox in a man who recently had traveled to Canada, and investigators are looking into whether it is connected to recent cases in Europe. (Cynthia S. Goldsmith, Russell Regner/CDC via AP)