@wsbgnl I'm not sure what he's talking about but the CDC guidance on masks is based on 50 cases per 100k per week, not 10.
@wsbgnl我不确定他在说什么，但CDC对口罩的指导是基于每周每10万人中有50人感染口罩，而不是10人。
@wsbgnl I'm not sure what he's talking about but the CDC guidance on masks is based on 50 cases per 100k per week, not 10.
@wsbgnl我不确定他在说什么，但CDC对口罩的指导是基于每周每10万人中有50人感染口罩，而不是10人。