polio was already on the decline because of hygiene/sanitation.

they changed how they diagnosed polio immediately after the introduction of the vaccine.

if you disagree and are not a doctor, you are uninformed. if you are a doctor, you are a quack.

i googled problems reproducing medical sciences... and found this...

trouble in science massive effort to reproduce science

yet it is about psychology! inside the article is a link...

No, science’s reproducibility problem is not limited to psychology

i actually talked to a guy that missed this. this is intentional. not nice.

here is a good video... [science is having trouble reproducing results from old studies]