PROVINCETOWN, Massachusetts — Adding more insight into the Centers for Disease Control’s updated mask guidance, newly published details of the Provincetown outbreak raise concern that the now-dominant Delta variant may be able to spread among fully vaccinated people. Following multiple large gatherings in Provincetown, Mass., from July 3-17, investigators identified 469 Covid-19 cases, two-thirds of … Continue reading Vaccinated people are majority of infected in massive outbreak in Massachusetts