As my Worldometer table has weekly been showing, COVID-19 and the Delta variant are now in worldwide decline.   From the  New York Times  this morning, the USA reflects this drop: There is a ten-day to two week lag from new cases to new deaths, as shown here: The next worry will be the Fall and Winter, when people go indoors.  However, schools have returned, and yet we are experiencing those above declines.  Part of the reason must have to do with vaccinations.   76% of Americans have now received at least one  shot. United States vaccinations At least one dose Fully vaccinated All ages* 65% 56% 12 and up 76% 65% 18 and up 77% 67% 65 and up 94% 83% The latest guess is that  90%  of the population needs to be fully vaccinated for herd immunity to be reached. Said former FDA commissioner Scott Gottlieb and author of  Uncontrolled Spread :    Covid has not only been one of the worst pandemics in modern times. It has been an unnecessarily terrible pandemic. Of the   more than 700,000 Ameri