The CDC is out with updated Covid-19 recommendations that call for "fully vaccinated people to wear a mask in public indoor settings in areas of substantial or high transmission" because of the risk posed by the Covid-19 delta variant. Suffolk County is an area of "substantial" transmission, the government says.
Suffolk County also includes Chelsea, Revere and Winthrop.
Other recommendations include telling people with immune problems - or who have household members with immune problems - to wear masks even in areas with low transmission.
Also, fully vaccinated people should get tested if they have a known exposure to somebody with a suspected or confirmed case and should "wear a mask in public indoor settings for 14 days or until they receive a negative test result."
CDC recommends universal indoor masking for all teachers, staff, students, and visitors to schools, regardless of vaccination status.