I am very puzzled by the fact that young people are getting infected again. They don't take precautions despite an enormous amount of information. It's like riding a race car at 200 kilometers an hour. Some people like the risk.
In my day at 12 years old which was 38 years ago we worked out in summer months for two and a half hours. Today someone in that age group might work out for four hours two hours in the morning and two at night.