For the third time in three years, a few ultra-Orthodox Jews who refuse to accept public-health norms have played a role in introducing a disease to New York City. Their rabbis should act before bigots do. — In 2019, measles spread from Ukraine to Israel to London to Brooklyn in networks of ultra-Orthodox families who refused to vaccinate their children. No one died, but more than 100 victims, most of them children, were hospitalized with pneumonia or with encephalitis, which can cause brain damage.