21 — but not before then, despite calls for faster change.“ In high transmission, we wouldn’t have even been having this discussion before....
That would be one marker that we have much of the pandemic behind us, ” she said....
And that means wearing masks.” Crystal Watson, a public health professor at Johns Hopkins University, recommended that leaders wait longer before relaxing their mask mandates. Advertisement The omicron variant has swept through the U.S. population....
综合
华盛顿邮报-华盛顿特区
2022-02-14 00:00:00.0