I think what most people don't understand is how little particles you have to ingest to become infected. Even washing your hands well with soap and water doesn't remove 100% of germs. I think many people don't wash their hands for the recommended 15-20 seconds. People who are not emetophobic are not that germ conscious because coming down with a virus is just a normality, you know? Therefore, they're more likely to eat with their fingers and so on and so forth.