Boglarka Kapas, the Hungarian swimmer and world 200m butterfly champion, said she tested positive for the coronavirus.
“I don’t have any symptoms yet, and that’s why it’s important for you to know that even if you feel healthy you can spread the virus,” was posted on her social media. “Please be careful, stay at home and stay healthy.”
Nine total members of the Hungarian national team — including swimmers and staff — have tested positive, according to the federation.
Kapas said her first test was negative but a second test showed she had the virus. She was staying in quarantine at home for two weeks.
Kapas, 26, won the 200m fly at last summer’s world championships by passing Americans Hali Flickinger and Katie Drabot in the last 25 meters. She clocked 2:06.78 to prevail by .17 of a second.
Kapas also took bronze in the Rio Olympic 800m freestyle won by Katie Ledecky.
The Associated Press contributed to this report.