20th century hubris poisoned so many studies I would rather say. I have this example but there are literally hundreds: You know about the 5 μm particle size l

20th century hubris poisoned so many studies I would rather say. I have this example but there are literally hundreds: You know about the 5 μm particle size limit for it to become airborne? Washing hands for protecting against aerosols? It’s parroted bad research; and wrong. The main infection path of upper respiratory diseases is through aerosols. The medical literature says it’s through hands that are touching the mouth and the nose but this is wrong. It was shown in the 1940s that viruses can spread through aerosols and that aerosols are particles under 100 μm. Research was done on tuberculosis. Tuberculosis is caused by bacteria that must infect the deep inside parts of the lung. For that it needs an aerosol size of 5 μm. Other diseases can do with aerosols of 5-100 μm. Now, a meme was born that only 5 μm particles can get airborne. And this was just accepted by the Western medical canon and the WHO.