"…An outbreak of pertussis is ongoing among the Orthodox Jewish communities in Crown Heights, Williamsburg, and Borough Park, Brooklyn. From October 2014 through October 2015, 109 cases of pertussis have been reported to the New York City (NYC) Department of Health and Mental Hygiene (DOHMH), with an increase in cases over the past four months. The majority of cases (90%) are children aged less than 19 years (median age 4 years), of whom 52% were unvaccinated or not up to date with pertussis-containing vaccine. Infants aged less than 1 year account for 34%…of cases. Of the 37 mothers of infants with pertussis, only 3 (8%) received the recommended tetanus-diphtheria-acellular pertussis (Tdap) vaccination during their most recent pregnancy. Five infants were hospitalized, including one who had pneumonia.…"