I know colds come from around 200 different kinds of viruses.
https://en.m.wikipedia.org/wiki/Common_cold
But would it be worth the risk to be purposefully infected with every type of strain that causes colds at once, being immune to all of them after? Or would this likely kill someone?
I don't know if there are other diseases where a vaccine isn't available so one just infects oneself so they can prepare for it and get it over with. I know people get chicken pox on purpose when they are a kid but I read it's less dangerous when one is young.
Also, maybe this would be a way to eradicate the disease if everyone did it? But maybe it would be too risky for certain parts of the population.