N.Y.C. Admin. Code § 17-109: § 17-109 Vaccinations.

a. The department is empowered to collect and preserve pure vaccine lymph or virus, produce diphtheria antitoxin and other vaccines and antitoxins, and add necessary additional provisions to the health code in order to most effectively prevent the spread of communicable diseases.

b. The department may take measures, and supply agents and offer inducements and facilities for general and gratuitous vaccination, disinfection, and for the use of diphtheria antitoxin and other vaccines and antitoxins.