From the beginning of COVID in March 2020, I began to wear N-95 masks as long as I went out since my age was not qualified to take the vaccine at that time. Wearing masks is really important and useful since it could decrease the spread of COVID for about 98 percent. Meanwhile, I tried to avoid gathering in public and keep social distance with others outside. I also took the COVID test regularly by myself, which was a kind of responsibility for both myself and all the people around me.....