My freshman son is vaccinated and as such has a low risk of serious infection or ability to transmit to others. Neither he nor others who made the effort to get vaccinated should have to wear a mask for the benefit of those who for whatever reason did not. Everyone has had the chance. There is no excuse at this point. Let them live their lives and for those who decided to take their chances by not getting vaccinated, let them bear the responsibility for their own inaction.