From a report on the covid positive gymnast :
Kara Eaker (18), an alternate for the United States Olympic gymnastics team, has tested positive for COVID. Leanne Wong (17), another alternate, has been placed in quarantine as well due to close contact with Kara.
After the Olympic team was named last month, most of the four alternates were asked if they were vaccinated. Kara Eaker and Emma Malabuyo said they were already vaccinated. Leanne Wong said her parents are research scientists and that they discussed the vaccine with her but she chose not to get vaccinated. The fourth alternate, Kayla DiCello was not asked if she was vaccinated at the same press event.
This strikes me as odd