For contagious viruses?
Has there ever been a study that proves person-to-person transmission of viruses?
In the entire history of the published medical research, there is not one so-called pathogenic disease-causing virus that has ever been found in one bodily fluid of one person. Not HIV, Ebola, Zika and SARS-CoV-2. Do you disagree with that? Present a paper proving such and explain the process fully. You’d be the first in all of mankind to do so.
Source : https://stolenhistory.net/threads/viruses-are-not-contagious.5618/
I had read a study from around the Spanish flu were they would have sick people spit in the mouths of healthy people to try and pass on the flu but they were not successful. It was determined to be other factors that caused health pandemics.
Dudes probably masturbating under their lab coats during that "experiment"