State law allows waivers for religious or moral reasons.
General Statutes of Connecticut Sec. 10-204a. Required immunizations. Temporary waiver
Any such child who (1) presents a certificate from a physician, physician assistant, advanced practice registered nurse or local health agency stating that initial immunizations have been given to such child and additional immunizations are in process under guidelines and schedules specified by the Commissioner of Public Health; or (2) presents a certificate from a physician, physician assistant or advanced practice registered nurse stating that in the opinion of such physician, physician assistant or advanced practice registered nurse such immunization is medically contraindicated because of the physical condition of such child; or (3) presents a statement from the parents or guardian of such child that such immunization would be contrary to the religious beliefs of such child or the parents or guardian of such child, which statement shall be acknowledged, in accordance with the provisions of sections 1-32, 1-34 and 1-35, by (A) a judge of a court of record or a family support magistrate, (B) a clerk or deputy clerk of a court having a seal, (C) a town clerk, (D) a notary public, (E) a justice of the peace, (F) an attorney admitted to the bar of this state, or (G) notwithstanding any provision of chapter 6, a school nurse; or (4) in the case of measles, mumps or rubella, presents a certificate from a physician, physician assistant or advanced practice registered nurse or from the director of health in such child’s present or previous town of residence, stating that the child has had a confirmed case of such disease; or (5) in the case of hemophilus influenzae type B has passed his fifth birthday; or (6) in the case of pertussis, has passed his sixth birthday, shall be exempt from the appropriate provisions of this section.
Regulations of Connecticut State Agencies Sec. 10-204a-2a. Adequate immunization
(m) Religious exemption. Any individual whose parents or guardian presents a statement that such immunization is contrary to the religious beliefs of such child is exempted from immunization requirements.