Since the Delta Version of the COVID-19 has started to raise the infection rate of the New York again. It is necessary to maintain social distancing and keep the masks on for everyone’s safety. However, since the New York State has already finished reopening process, and masks are no longer required. University’s classrooms could be hazard environments. According to CDC’s latest statement, vaccines will not stop the virus spreading, but only limit the chance of the COVID-19 patients getting life threatening conditions. Not to mention that there are still many people not fully vaccinated yet. In addition, New York State’s daily infection rate has reached to a new height, which is about 3,600 people per day, and the number is still raising.