Among them, more than 500000 cases were diagnosed in the United States, ranking first in the world.
With the domestic epidemic prevention and control entering the "second half", asymptomatic infection has attracted great attention. The novel coronavirus pneumonia expert, Zhang Wenhong, head of the Shanghai infectious disease division and the new crown pneumonia expert group, said: "asymptomatic infection can be 14 days without infection and has the possibility of infection."
Previously, Zhong Nanshan also stressed that we should not only pay attention to symptomatic people, but also pay special attention to asymptomatic close contacts of diagnosed patients. In the second half of the national war epidemic, something worrying still happened!
If we have asymptomatic infection around us, what should we do? Wu fan, vice president of Shanghai Medical College of Fudan University and President of Shanghai Preventive Medicine Association, said that strengthening personal protection for ordinary people is an effective means, mainly by washing hands frequently and wearing masks on some occasions.