Bloomberg: 

The news around the delta variant in the U.S. keeps getting worse, threatening progress toward any return to some semblance of normalcy. New data released by the Centers for Disease Control and Prevention suggest the variant is as infectious as chicken pox and that vaccinated adults can readily spread it. The study of an outbreak earlier this summer in Cape Cod where many of the infected had been vaccinated contributed to the recommendation that people mask up again. Adding to the nation’s woes: new data puts the CDC’s decision to stop comprehensively tracking so-called breakthrough cases—just as delta was emerging—under scrutiny. Here’s the latest on the pandemic. —Margaret Sutherlin

Bloomberg is tracking the progress of coronavirus vaccines while mapping the pandemic worldwide.