How quickly the U.S. is vaccinating vs. how long it’ll take to get back to “normal”

Vaccines provide light at the end of the tunnel, but when we finally get to the end depends on the speed at which we vaccinate. The Washington Post considers Joe Biden’s pledge for 100 million shots in his first 100 days in the context of herd immunity and calendar days.

I appreciate the time spent explaining the intersection of these two lines.