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Shortly after the Olympics opened in Paris, social media buzzed with triumphant posts celebrating athletes' victories.

Then came moments of heartbreak and tension. British swimmer Adam Peaty missed the gold in the 100-meter breaststroke by 0.02 seconds and later tested positive for COVID-19. Australian swimmer Lani Pallister withdrew from the 1,500-meter freestyle after testing positive to conserve her energy for the upcoming 4x200-meter freestyle relay on Thursday.

The International Olympic Committee (IOC) has not provided an official count of Olympians with COVID-19, but media reports indicate at least eight infected athletes as of July 31. About 11,000 athletes are competing in Paris, according to the IOC. Head over to WebMD to read the full story.