It's good to ask these paradigm-challenging questions and scrutinize the evidence yourself, like when I briefly gave Flat Earth a chance. In this case I believe, based on everything I've observed and pieced together, that infectious/parasitic microorganisms exist. How else do you explain people getting colds? This one time, I was at the gym - you know, that place with all the communal work-out equipment that everyone touches with their disgusting, greasy, germ-covered hands, and sits on with their sweaty asses (where poo comes from), then only kinda half-ass wipes them down when they're done. And I think I had a dry booger or something I had to get out of my nose, so I went to the washroom to wipe my nose with paper towel, and as I was doing that, my finger, which I had not washed since touching gym equipment, broke through the paper towel and touched the inside of my nose. And by that night I had a mild nose-irritating cold. I guess it could be a placebo effect, but more likely it was germs. I think avoiding mistakes like this and diligently washing your hands will greatly reduce your chance of contracting the latest Jewish bioweapon. And a whitepill - diligent hand washing and general attention to hygiene is a White people thing (and some Asian cultures), so a global deadly plague would put us at an advantage.