social distancing primer
From my lovely and talented wife: The important thing that isn't really coming through to the public, I think, is the relative risk of various behaviors/activities. I worked for 28 years with bucket loads of respiratory pathogens without getting sick. I studied how the microbes caused the diseases once they were transmitted. I didn't study transmission, epidemiology, or public health. But close. For a respiratory pathogen to cause disease, it has to get into the respiratory tract. The most direct route is breathing in droplets in the air from an infected individual who is secreting them into the fluids of their respiratory tract. Even then, there is a dose effect, so the more of them you breathe in, the more likely you are to get infected. For very rare diseases it only takes a very few microbes, but for most it takes a minimum of several thousand, often millions or more. The number in a single droplet will depend on how many the infected individual you encounter is secret...