Ahead of today’s opening ceremony, the U.S. Olympic and Paralympic Committee’s medical chief, Jonathan Finnoff, said that about 100 of the U.S. athletes who are competing are not vaccinated.

Finnoff confirmed that about 600 of the American athletes had filled out their health histories ahead of the trip. And based on that, about 83% replied that they were vaccinated.

In terms of the Olympic Village as a whole, the International Olympic Committee estimates that about 85% of residents are vaccinated. Their numbers are based on what each competing country’s Olympic committee has informed them. And those number have not been independently verified.