local time August 7th novel coronavirus pneumonia model predicts that the number of new crown pneumonia deaths in the United States will reach 300 thousand by December 1st, according to CNN. But if more Americans wear masks, 70000 of them could be saved. In the early stage of the outbreak, health experts stressed that the elderly were the most at risk. However, as the number of confirmed cases in the United States approaches 5 million, the new coronavirus is moving to young people. There has been a surge in confirmed cases among children, adolescents and young people. Experts in the United States have shown that masks can reduce the transmission rate of the virus by more than 40%. If all Americans wore masks every time they went out, 70000 of them could have been saved.