> even people like me who thought they were covered by vaccination from dutiful parents, are still vulnerable to all these diseases I was surprised to see that

> even people like me who thought they were covered by vaccination from dutiful parents, are still vulnerable to all these diseases I was surprised to see that some of the vaccines I thought are rock solid share some traits with the great COVID vaccines: not everyone develops immunity, and the immunity gets worse and worse over time, so you need "boosters" every 5-10 years, and most adults have very little actual protection against the diseases they thought they are vaxxed against. Example, whooping cough: > In children, DTaP protects: > (...) About 7 out of 10 children for five years after the fifth shot. > In adults, Tdap protects: > About 7 in 10 people for the first year after the shot. > About 4 in 10 people for four years after the shot. https://my.clevelandclinic.org/health/drugs/21639-pertussis-whooping-cough-vaccine https://my.clevelandclinic.org/health/drugs/21639-pertussis-... These numbers don't look all that great to me.