Key to reopening Mass. is not May 4 deadline, Baker says; Massachusetts. coronavirus deaths rise to 2,730:Massachusetts won’t begin to reopen businesses until the pace of new hospitalizations for coronavirus declines and state officials have put “the rules of engagement in place,” Governor Charlie Baker said Saturday. The state’s stay-at-home advisory and shutdown of all non-essential businesses, drastic measures to control the spread of the contagion, are slated to end May 4. But Baker signaled that the restrictions, which have caused vast economic and social disruption, are likely to remain in effect until the recent wave of cases subsides.