Highly contagious Delta variant on path to become dominant strain in the US

William Brangham:

Even the U.S., with nearly half its population vaccinated, and as people ditch masks and pack back into restaurants and arenas, the Delta variant is becoming the dominant source of cases here as well.

Where vaccination rates are low, like in the South and some Western states, this variant is growing. Public health officials now say unvaccinated people account for virtually all hospitalizations and deaths in the U.S.