If you look at places like Arizona, Texas, Florida and Georgia, the reproduction number, Rt, is lower than during lockdown.

Are people somehow practicing social distancing more now than during lockdown? The data doesn't seem to suggests this.

Immunity is likely a factor.

6/n pic.twitter.com/ZXilKVfYzS

— Youyang Gu (@youyanggu) August 25, 2020