The theory isn't making you stronger against all pathogens, but pathogens you already know.Yeah that's a novel theory, that you have to have some exposure to pathogens so your immune system is ready for it.
Problem with that is that we had all kinds of exposure to pathogens, especially in crowded cities, for all our lives. Then a novel coronavirus came along and turned the world upside down.
Our previous exposure to beta coronavirus wasn't cross-protective enough.
Far less so than those who have never been exposed to Influenza. Once you've survived a pathogen, you are generally better able to resist it on future exposures. That's the whole point of the cellular immune response. If that did nothing, every year pathogens would tear through the population like they did the naive populations of the Americas etc.Nor all the flu strains which have circulated for hundreds or thousands of years, every flu season we're vulnerable.
Hyperbolic argument just to make an erroneous counterpoint to an argument I never made. Have I at any point advocated against vaccination? No. Have I suggested 'natural immunity' is better than a first vaccine? No. Especially for novel viruses with no prior species-wide exposure.And if you take that attitude, think about the days before we had things like polio vaccines. Did getting exposed to polio unvaccinated make those people stronger or just more liable to become paralyzed?
Unless you live in a bubble, you'll get (re)infected. If you are living in a way that prevents exposure to Covid, you'll be avoiding exposure to all disease. Deaths among children from common disease, Strep A and RSV, are significantly higher than pre-lockdown levels. Coincidence? There's no clear best course of action.As far as avoiding infections and especially reinfections, we don't know the true cause of Long Covid but one of the theories is that not all the virus is cleared by the immune system. Even inactivated virions may not be benign, for instance one of the problems is micro clots suspected of being caused by covid.
I don't mean live in a literal bubble to avoid infection. I mean just taking those practices to minimize the odds of getting infected.
However, 1) on the species level, deactivating the immune system by negating all exposure to disease seems a bad idea and 2) on the individual level, different people reacting different ways should be allowed to follow their best nature, no? If some people develop better resistance and cope best by maintaining a healthy immune system by living in amongst all the pathogens, they should be allowed to do so. We shouldn't assume a one-size-fits-all solution where the base principle of effective evolution is diversity.