2019 the novel coronavirus (2019-nCoV), was discovered in 2019 in Wuhan, and was named by WHO in January 12, 2020. Coronavirus is a large virus family, which is known to cause cold, Middle East respiratory syndrome (mers) and severe acute respiratory syndrome (SARS) and other serious diseases. 2020 there are many countries affectied.
what is face mask? How many types of face masks there are ?How do we import and export the quality face mask from China?