Infectious mononucleosis
FILE - In this Saturday, May 22, 2021 filer photo, I taly's Gregorio Paltrinieri competes during the men's 1500 meters freestyle finals at the European Aquatics Championships in Duna Arena in Budapest, Hungary. Italian swimmer Gregorio Paltrinieri has contracted mononucleosis, raising questions over whether he’ll be able to defend his gold medal in the 1,500-meter freestyle at the Tokyo Olympics. “We’re obviously upset because his Olympic preparations were proceeding perfectly,” Italian Swimming Federation president Paolo Barelli said Wednesday. “But Paltrinieri is a phenomenal champion and will battle down to the last meter to win the medals he’s dreaming about for Tokyo.” (AP Photo/Petr David Josek, File)
Olympic swimming champion Paltrinieri has mononucleosis

Jun. 23, 2021 10:54 AM EDT