the only one i remember reading research about that may possibly help is the BCG vaccine for TB. they allegedly showed an increase in the immune system's ability to fight off other infections in african women. all the others though are either poison, full of dna plasmids or harmful neurotoxins, OR literally useless unless you're a drug addict or a prostitute. and even then, probably doesn't help.
tetanus and flu shots are the big ways they further injure the adult population. i mean…up until 2020.
what's the point vs natural infection through your nose/mouth/lungs/digestive system? should just try to keep yourself healthy instead.
even in that situation it sounds like there was still an underlying deficiency in either diet or sanitation if children were susceptible to dying from chicken pox or measles. most people haven't died from it. so it makes sense as a last effort to curb the death but leaves a lot of questions.
i know. i have realized that most disease has been man-made. with specific intentions.