[DoingIsLearning]

But are you sure you aren't just trying to be contrarian and fishing for data?

Vaccinations were as early as the late 1800's and the first widespread programmes for yellow fever in 1930's.

Most of the allergy/asthma incidence begins to spike in the 1970's.

Excessive use of disinfectants, and excessive use of antibiotics is a much more likely mechanism.

Antibiotic resistance was precipitated by excessive antibiotic prescription in both humans and the animals humans eat.

coincidentally the increase in antibiotic resistance rising from the 1970's onwards is very much aligned with allergy anaphylatic reactions rise from 1970's onwards.