It's a public health failure that Olympic and Tour de France athletes only started wearing masks and taking precautions after their teammates had to withdraw due to COVID. We know COVID is widespread and highly transmissible, it was always going to disrupt these competitions.
https://www.theguardian.com/sport/article/2024/jul/30/olympic-swimmers-wear-masks-as-concerns-over-covid-rise-across-camps?CMP=share_btn_url