With this knowledge, infectious people can stay home and quarantine before they infect others....
People can visit testing sites, like tents outside pharmacies in France or abandoned nightclubs in Germany, and get tested at no charge....
During that time, a person with COVID can spread it to others. The shortage of testing in the U.S. may be contributing to the virus’s spread....
综合
芝加哥论坛报-国家与世界
2021-09-21 00:00:00.0