The authors said the findings suggest the CDC’s mask guidance should be expanded to include the entire country, even outside of hot spots. The findings have the potential to upend past thinking about how the disease is spread....
About three-quarters of them were people who were fully vaccinated. Delta variant as contagious as chickenpox, according to CDC internal report?...
“ Unfortunately, I’ve now learned it’s a few steps toward normal, not the zero-to-sixty that we seem to have undertaken.
综合
芝加哥论坛报-国家与世界
2021-07-31 00:00:00.0