Most of them are age 60 or older and often have underlying health problems.In the United States, which has experienced more Covid-19 cases and deaths than any other country, the Delta variant represents about 83pc of new infections....
The people who are vaccinated have got to be especially careful....
This is a tough one," Topol said.In the United States, the Delta variant has arrived as many Americans — vaccinated and not — have stopped wearing masks indoors." It's a double whammy," Topol sa
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黎明报-最新
2021-07-27 00:00:00.0