Arizona governor says schools can't force unvaccinated students to quarantine if they're exposed to Covid-19 By Mallory Simon, CNN Updated 3:26 PM ET, Fri July 16, 2021 Arizona Gov. Doug Ducey's education adviser sent a letter to two school districts stating a mandatory quarantine practice is contrary to state law. (CNN)Arizona's governor has told two school districts that requiring unvaccinated students exposed to Covid-19 to quarantine is against state law. Gov. Doug Ducey's education adviser sent a letter to the districts stating the mandatory quarantine practice is contrary to state law because Arizona does not require students to be vaccinated or wear a face covering to attend school.