By Julia Gergely and Shira Hanau The morning after the Centers for Disease Control recommended a COVID-19 vaccine for children 5 and older, the Abraham Joshua Heschel School on Manhattan’s Upper West Side had news for parents. By Feb. 1, 2022, the school announced, all children eligible for the vaccine must be fully vaccinated. “Heschel’s policy has been and remains that all eligible members of our in-school community must be vaccinated against Covid-19,” wrote Head of School Ariela Dubler in an email to parents. Ten miles away in the Riverdale section of the Bronx, the administration at another Jewish school,...