Mu-ving on up

Infections are falling as Delta fades, but the newer strain is spreading fast. If we can't stomach a lockdown, we need to vaccinate the other 75% of the planet.

The Mu strain of Covid-19 appears to be spreading fast, and is now in 49 U.S. states—up from a reported three just a day before—and in 39 countries. It still only represents 1% of all U.S. cases so far, and still no word on how well vaccines work against it, so stay tuned.

In the meantime, the overall surge brought to you by the Delta strain is ebbing f…