As Of September 1st: 20 States (All With Republican Governors) Prohibit Proof-Of-Vaccination Requirements

By Ballotpedia.com

Here are “the 20”: AL, AK, AR, AZ, FL, GA, ID, IN, IA, MO, MT, ND, OH, OK, SC. SD, TN, TX, UT & WY.

Four states have instituted vaccine requirements: CA, HI, NY & OR