Mohel disclosure rule
In 2015, de Blasio repealed a rule asking mohels to inform parents of the risks of metzitzah b'peh, an oral circumcision ritual that was linked to 17 cases of infant herpes, brain damage, and two deaths since 2000.[130][131] The rule, which had been passed by the city's Board of Health in 2012 (under Bloomberg), required parents to sign a consent form, and had been called an infringement on religious freedom by ultra-Orthodox Jewish leaders who sued the city in federal court[132] and pressed their followers not to comply.[133] After de Blasio installed allies and donors on New York City's Board of Health,[134] a new policy stated that the mohel could be banned for life if he tests positive to herpes and the DNA strain matches the infant's, but only after a child has been infected, and not in a situation where a mohel tests positive but his DNA strain does not match the infant's.[135] It was revealed that the city did not disclose new infections.[136] Since the change was made, several children were infected with the disease after undergoing the religious ritual.[137]
https://en.wikipedia.org/wiki/Bill_de_Blasio