FILE - In this June 19, 2021, file photo, Michael Andrew participates in the men's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials in Omaha, Neb. A debate is fomenting between former gold medalist Maya DiRado and some American swimmers over Andrew's decision not to be vaccinated against the COVID-19 virus on the eve of competition at the Tokyo Olympics. (AP Photo/Jeff Roberson, File)

FILE - In this Aug. 11, 2016, file photo, United States' Tom Shields competes in a men's 100-meter butterfly semifinal during the swimming competitions at the 2016 Summer Olympics, in Rio de Janeiro, Brazil. A debate is fomenting between former gold medalist Maya DiRado and some American swimmers over Andrew's decision not to be vaccinated against the COVID-19 virus on the eve of competition at the Tokyo Olympics. (AP Photo/Martin Meissner, File)

FILE - In this Aug. 12, 2016 file photo, United States' Maya DiRado celebrates with her gold medal during the women's 200-meter backstroke medals ceremony during the swimming competitions at the 2016 Summer Olympics in Rio de Janeiro, Brazil. A debate is fomenting between former gold medalist DiRado and some American swimmers over Michael Andrew's decision not to be vaccinated against the COVID-19 virus on the eve of competition at the Tokyo Olympics. (AP Photo/Michael Sohn, File)