All New York City public school teachers and other staffers will have to get vaccinated against the coronavirus, officials said Monday as the nation’s largest school system prepared for classes to start next month.

The city previously said teachers, like other city employees, would have to get the shots or get tested weekly for the virus. The new policy marks the first no-option vaccination mandate for a broad group of city workers in the nation’s most populous city, though Mayor Bill de Blasio announced Friday that coaches and students in football, basketball and other “high-risk” sports would have to get inoculated before play begins.

Now, about 148,000 school employees — and contractors who work in schools — will have to get at least a first dose by Sept. 27, according to an announcement from the Democratic mayor and the city health and education departments.

“We want our schools to be extraordinarily safe,” de Blasio said. Schools Chancellor Meisha Ross Porter called the policy “another layer of protection for our kids,” including her own 11th-grader.

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