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Health vaccines and their associated compliance listings are based on state guidelines. The following information describes vaccine compliance rules as defined by the Montana Department of Health.

For more information on the creation, modification or deletion of vaccine compliances, see the Vaccines page.

Montana Vaccines Tool

See the Immunizations (Montana) and Immunization Batch Report (Montana) for more information about Montana-specific immunization records.

General Compliance

Half-doses or reduced doses of a vaccine are not considered valid.
4 day tolerance periods should be given for all spacing requirements.

DTaP

Rule	Requirements
3 Doses - Complaint - Age 7 and older	First does on or after 1 year of age At least 1 dose of Td/Tdap on or after age 7
4 Doses - Compliant - Pre-Kindergarten	Must be in a State Grade level of PK
4 Doses - Compliant	4th dose on or after age 4 Difference between dose 4 and birth date is less than or equal to 7 years
4 Doses - Compliant - Age 7 and older	At least one dose of Td/Tdap on or after age 7

Tdap

Rule	Requirements
1 Dose - Compliant - Grades 7-12	Td or Tdap Difference between the last dose and birth date is at least 7 years (4 day tolerance) Grades 7-12 Start date of 7/1/2011
Grades 7-12 - Non-Compliant	Ages 7 and older Grades 7-12 Difference between last dose of DTP, DTaP, DT, Td or Tdap and effective date is at least 5 years Start date of 7/1/2011
Default	No Requirements

MMR

Rule	Requirements
1 Dose - Compliant - Pre-Kindergarten	First dose on or after 12 months of age
2 Doses - Compliant	2 Measles, Mumps and Rubella OR 2 Measles, 2 Mumps, 2 Rubella OR 1 Measles, Mumps, Rubella and 1 Measles, 1 Mumps, 1 Rubella 1st dose on or after 12 months of age Difference between dose 2 and previous is at least 1 month

Polio

No requirement for students 18 years of age and older.

Rule	Requirements
3 Doses - Compliant - Pre-Kindergarten	No requirements
3 Doses - Compliant	Dose 3 on or after 4th birthday Difference between dose 3 and previous is at least 28 days Difference between dose 2 and previous is at least 28 days

Hib

No requirement for students age 60 months and older.

No requirements for students in grades K-12.

Rule	Requirements
1 Dose - Compliant - Pre-Kindergarten	1st dose on or after 12 months of age

Varicella

No requirement for students 0 to 11 months.

Default of non compliant.

Rule	Requirements
1 Dose - Compliant - Pre-Kindergarten	Minimum age 12 months Dose on or after 1st birthday
2 Doses - Compliant - PK-12th Grade	Minimum age 12 months First dose on or after 1st birthday Space between dose 1 and dose 2 must be equal to or greater than 28 days.

Immunization Rules (Montana) [.2223 and previous]

General Compliance

DTaP

Tdap

MMR

Polio

Hib

Varicella

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