Peter Attia· MD
a virus is like about a hundred nanometers wide do you know what a nanometer is something there is not yeah it's like a billionth of a meter so if we were to cut one of your hairs and you can barely see the end of your hair when it's cut right how many coronaviruses do you think you could line up across the tip of your hair if it were cut probably hundreds yeah about a thousand actually thousand so think about how small that is that's very small so we can't see these things