Amid Cambridgeâs Covid-19 vaccination campaign and phased reopening, city officials urged the public to remain vigilant against the spread of virus variants during a Monday City Council meeting. On Feb. 18, Massachusetts progressed to Phase Two of its vaccination program, which extends coverage to individuals over the age of 65, residents and staff of low and affordable income senior housing, and individuals with two or more comorbidities. Teachers, service workers, and individuals with one underlying medical condition also fall under âPhase 2,â but are not yet eligible to receive the vaccine. The general population will have access to the vaccine under âPhase 3,â which is set to begin in April, per the Massachusetts Department of Health.