Was the unfamiliar word of social distancing circulating around the time of the declaration of a state of emergency? A few people should keep the distance, shouldn’t they? And the distance is 2 meters. But where did the reason for that distance come from? At the beginning, it was about 1.5 meters because the distance between them was to spread two people’s arms so as to keep the distance to prevent splash infection, but it became 2 meters before I knew it. I don’t think it’s based on scientific data. Furthermore, the runners have to keep 10 meters distance. And there is no basis for it. The scary thing is that this number is walking alone.
Aerosol is floating in the air, but what does it mean at 2 meters distance?
Let’s take the familiar (?) fart odor as an example of the reason why the two meters are thin. When you fart, does the smell not smell if it is 2 meters away? No, that’s not the case. Depending on the degree of odor, generally you will not be able to avoid damage if you do not leave 5 meters away. And the reason it doesn’t smell over time is simply because it spreads. Therefore, I want to keep the distances at least 5 meters.
It is completely meaningless that the distance between runners is 10 meters. The distance of 10 meters can be reached in a few seconds. When the runner in front is farting, hit the runner 10 meters behind. Any runner knows that. If it’s me, I want to be 100 meters away
You may argue that fart is a gas here, and is different from aerosols produced by coughing and breathing. Since the gas emitted from the body contains water, it should be treated as the same aerosol.
By the way, why did they make it 2 meters, but if it goes beyond that, it will be impossible to maintain communication such as conversation. It is believed that people are obliged to reduce the level of whether it is possible in real life, whether it is a mask or hand washing, based on scientific grounds. Because it is impossible for all the people to wear N95 masks or put their hands on alcohol for 10 minutes.
By the way, do you know that there are underwear that eliminate the smell of farts? It seems that activated carbon is inside. The person who developed this must have won the Ignobel Prize. Do you think that a mask containing activated carbon is effective if you get a hint from this idea? Even if it isn’t sold, putting a sheet of activated carbon into the mask may be effective even with your own cloth mask.