Use of an exemption to immunization due to conscientiously held beliefs for immunization against measles, mumps, and rubella prohibited.

HF 3239 prohibits using "conscientiously held beliefs" as an exemption for measles, mumps, and rubella (MMR) vaccinations in Minnesota schools and child care facilities. It directly affects parents or guardians of children aged 15 months or older who previously relied on this exemption to avoid MMR shots for enrollment. The bill requires these parents to provide either proof of vaccination (meeting medical standards) or a medical exemption statement by August 1, 2026, to keep their child enrolled in schools, preschools, or licensed child care programs. This replaces the existing personal belief exemption for MMR vaccines, which will no longer be valid after the effective date. The law amends Minnesota Statutes 2024, section 121A.15, specifically adding subdivision 3c.