Long COVID in children is much rarer than in adults. Nobody is too sure what the exact risk of it is, but it is a fraction.
Approximately five or 6% of children who get COVID-19 end up with symptoms that might go on for a month or two. It is rare for it to go on longer than that. It is unusual even in adults for it to go on longer than that. However, some do get it for maybe even up to a year.
Fatigue, headache, a sense of fogginess, those all tend to be the commonest symptoms of long COVID.
Dr Norman Swan, Physician and Journalist