International College

There is a high risk of corona virus infection through the nose.
Due to the hot weather, many people put a mask down on their chin or put out their nose with only their mouth covered.
Researchers at the University of North Carolina in the U.S. analyzed the route of corona 19 virus infection using fluorescent protein. The researchers confirmed that the nose(nasal cavity) is the most vulnerable part of the corona 19 virus. The virus that entered the nose spread through the exhalation to the lower body of the throat, bronchial tubes and lungs.
Therefore, you must wear a mask to cover your nose and mouth completely.