‘Mission impossible’: With Boston’s proof-of-vaccination mandate set to begin, businesses worry BetaBostonVaccination requirement goes into effect in Boston Saturday WCVB Channel 5 BostonSome top Mass. lawmakers say the entire state should require proof of vaccination for certain indoor venues Boston.comBoston’s indoor COVID vaccine mandate to take effect Saturday, applying to restaurants, sports arenas, gyms MassLive.comProof of COVID-19 vaccine requirement for most indoor public spaces in Boston starting Saturday WCVB BostonView Full Coverage on Google News