With 100 days to go until the Winter Olympics, the U.S. Olympic and Paralympic Committee has begun the complicated and expensive task of identifying female skiers and snowboarders who need to take gender tests before they arrive in Italy.

The U.S. Olympic top doctor says all of the 200-plus athletes heading to Beijing for the Olympics next month are fully vaccinated, and not a single one asked for a medical exemption.

About 100 of the 613 U.S. athletes descending on Tokyo for the Olympics are unvaccinated, the U.S. Olympic and Paralympic Committee’s medical chief said hours before Friday night’s Opening Ceremony.