Attorney General Maura Healey says there's nothing legally wrong with communities ordering people to wear masks in public as an anti-coronavirus effort.
In response to a tweet from somebody who says that, no matter what health and elected officials in Cambridge and Somerville say, there is no proof masks work and how dare they threaten people with $300 fines, the state's top law-enforcement official replied:
Hi Bob, yes, a municipality can make wearing masks mandatory. They can also encourage people to wear face coverings in public on an advisory basis. It is up to the municipality to do what is reasonable to protect their residents. Thanks for your question & stay safe.
Both Gov. Baker and Boston Mayor Marty Walsh have urged people to put masks on while in public places - Walsh this week said even joggers and bicyclists should wear them - but have not made face covering mandatory.