The year 2020, which is one of the worst years of human history, is now going down. The time in which we should have a sense of security as in daily life disappeared. But we have been adjusting to the situation. We are getting used to using IT software to communicate a long distance. We invented the vaccine quicker than any vaccines released before. We are conquering the disease now. Since we have grown the strength of adaption to an unknown disease, we can manage another one if it emerges in the future.