With the switch, federal health officials have cited studies showing vaccinated people can spread the virus to others. Most new infections in the U.S. continue to be among unvaccinated people....
Currently, 58% of Americans 12 years and older are fully vaccinated, according to the CDC’s data tracker. People, however, are “ getting the message, ” and more are rolling up their sleeves amid the threat of the Delta variant, according to the director of the National Institutes of Health....
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综合
洛杉矶时报-世界与民族
2021-08-01 00:00:00.0