My mom is a nurse. One of her refrains when I was growing up was (and is) "Germs are real!"
People who previously didn't think anything of it will, for decades, be aware that if you're indoors and/or closer than six feet from a person who coughs, you will likely inhale airborne droplets that may contain viruses or bacteria from their lungs. I think this was known academically by some, and the risk was calculated and accepted by a few, but most people wouldn't have expected to inhale airborne droplets from someone they pass in a grocery store aisle.
People who previously didn't think anything of it will, for decades, be aware that if you're indoors and/or closer than six feet from a person who coughs, you will likely inhale airborne droplets that may contain viruses or bacteria from their lungs. I think this was known academically by some, and the risk was calculated and accepted by a few, but most people wouldn't have expected to inhale airborne droplets from someone they pass in a grocery store aisle.