
Two Olympic events could be in doubt after multiple athletes fell ill within days.
Swimmers in the Paris 2024 triathlon have entered the Seine River, which had previously banned swimming for over 100 years.
But organizers authorized a historic clean-up of the river before the Olympics began, and it was announced in July that it had passed the necessary tests to allow its use.
After the men's and women's individual races on Wednesday, a number of athletes complained about the water quality during the swim. Belgian athlete Jolien Vermeylen told VTW that she "felt and saw things we don't have to think too much about" while swimming in the Seine.
Belgium was then forced to withdraw from the mixed triathlon after Vermeylen's teammate Claire Michels fell ill. It was initially reported that she was hospitalized with an E. Coli infection, but Michels herself has confirmed that this was not the case and that a virus caused her illness.
According to the Associated Press, an unidentified female athlete from Sweden and a male athlete from Norway fell ill after competing in individual events in Seine last week.
A Swiss athlete fell seriously ill after the men's triathlon, while another athlete also contracted a gastrointestinal illness, forcing Switzerland to change its medley relay line-up.
It has not yet been confirmed whether any of the illnesses were a result of the Seine's water quality.