"This is not a good thing - repeated infections with the same virus only cause damage." Or not, if immunisation was achieved, like it usually does. If you woul

"This is not a good thing - repeated infections with the same virus only cause damage." Or not, if immunisation was achieved, like it usually does. If you would keep the kids at home, everytime they have to sneeze, then the schools would be pretty empty in winter, general education level drops further and everyone will get sick again anyway, the first time they interact with other people outside their home, as they let their immune system without work. The situation in the kindergarten was and is quite horrible after covid. All the diseases they did not get, while in lockdown - they got now and concentrated (that means, now it slowly seems to be moving towards normality). So air purifiers might still be useful, but I think it is an illusion to think to be able to prevent all or most diseases. Sure, some very dangerous strains are to be taken with caution and if a lockdown would be really necessary, so be it. But infections are just a normal thing. Especially for children. This way they train their immune system step by step. So removing that step will be actually dangerous later on as there are quite some diseases that are quite mild for children, but deadly for adults, if they did not catch it as a child.