State law allows waivers for religious or moral reasons.
Indiana Code 20-34-3-2 Religious objections
Sec. 2. (a) Except as otherwise provided, a student may not be required to undergo any testing, examination, immunization, or treatment required under this chapter or IC 20-34-4 when the child’s parent objects on religious grounds.
STATEMENT OF IMMUNIZATION HISTORY; WAIVER; RULES - INDIANA CODE §20-34-4-5
A religious objection does not exempt a child from any testing, examination, immunization, or treatment required under this chapter or IC 20-34-4 unless the objection is: (1) made in writing; (2) signed by the child's parent; and (3) delivered to the child's teacher or to the individual who might order a test, an exam, an immunization, or a treatment absent the objection