Japan has not done much all along. And they are a very high density country. So the reality is that COVID lock downs don’t help. If they did Japan would have been killed. The reality is that Japan is healthy and clean. Their children have been in schools most of the time. Most of the population uses extremely crowded trains. So other than mask wearing, they really should have the most COVID. And they have gotten it. But they did not die.Those with symptoms took antivirals and got better. Being healthy is helpful when it comes to COVID.
Re: 15 - I wonder if there is also a specific genotype(s) that are more able to be exposed to SARS-CoV-2 and not become infected?
Not as many people in Japan who are overweight (besides sumo wrestlers). I wonder how many Japanese smoke when compared to Americans? You see people who are overweight and have a lung or heart condition - a dangerous situation and Covid makes it more dangerous.