According to the CDC, 86% of children in the USA had antibodies from infection by July/August and every state (other than WA & ME) had seroprevelance >80%.
— PLC (@Humble_Analysis) October 1, 2022
In other words, everything failed to prevent childhood infection. Masks failed. School closures failed. Vaccines failed. pic.twitter.com/yGBX2Hnfy2