@NancyK07312478 @JeromeAdamsMD @drsajumathew It's not just masks. The tier levels and other recommendations matter too. Some companies change policy based on whether CDC defines risk in an area as "high".
@NancyK07312478@JeromeAdamsMD@drsajumathew不仅仅是面具。层级和其他建议也很重要。一些公司会根据CDC是否将某个地区的风险定义为“高”而改变政策。