New York City’s largest teacher’s union has won a battle to keep teachers and other educators employed if they suffer from certain medical conditions and don’t want to comply as a result with the Big Apple’s COVID-19 vaccine mandate. An arbitrator ruled late Friday that teachers with certain documented medical afflictions must be offered assignments outside of classrooms and be kept on the city’s payroll. Other educators who don’t want a COVID-19 vaccine must be offered unpaid leave that keeps in place their health coverage or a severance package. City officials announced last month that all 148,000 Department of Education employees would have to get a COVID-19 vaccine, with limited exemptions. The city planned to remove people who were granted an exemption from the payroll, infuriating the United Federation of Teachers (UFT), the city’s largest teacher’s union. “That was it for us,” Michael Mulgrew, the union’s president, said on NY …