Lockdown 20 not just stupid, it's horrible. This is MSM report on the cause of hepatitis in Children
During the lockdown period when children were not mixing, they were not transmitting viruses to each other. They were not building up immunity to the common infections they would normally encounter.
When the restrictions were lifted, children began to mix, viruses began to circulate freely - and they suddenly were exposed with this lack of prior immunity to a whole battery of new infections.
Link: https://www.bbc.com/news/health-61269586