- ADVERTISEMENT - The teachers union has argued that instructors shouldn’t be required to come back to the classroom until they are vaccinated, but the city—and other health jurisdictions—has limited supply of the vaccine and other priority groups who are in line to get the doses. Mayor Robert Garcia said at a media briefing Thursday that the city would ensure that teachers of younger grades are vaccinated, starting with pre-K through second next week and third- through fifth-grades “soon after.” “I want to give assurances that all teachers will get vaccinated,” Garcia said. “Educators know that we are here to support them.”