Don't forget the increasing prevalence of vaccination for every ailment under the sun, which diverts the immunity and is probably particularly dangerous for persons whose immunity is already compromised.
And parents making their kids live in a “plastic bubble” by making them avoid playing in dirt.......your immune system is like a muscle, “Use it, or lose it.”
Look at Lyrica it has a FIFTY PERCENT FAILURE rate due to bad side effects and yet they want to expand it's use to a 4th disease.
If you have side affects from a drug all your doctor does is switch you to a different one, and it does not get reported, doctors don't have time or financial resources to do so, nor does your drug store.