Michigan Compiled Laws, Chapter 333. Health § 333.9209

Sec. 9209. (1) Before November 1 of each year, the principal or administrator of each school shall deliver to the state and local health departments a list of the immunization status at the time of school entry of new entering kindergarten and first grade students.

(2) The department shall prescribe minimum percentage levels of immunization for children in a school.

(3) As a result of the information collected pursuant to subsection (1), the local health officer shall take appropriate action, including immunization clinics, to raise the immunization level of children entering school to the levels established pursuant to subsection (2).

(4) Before the following February 1, the principal or administrator of each school shall update the list to show the additional immunizations received by each child since entering the school. The reports shall be made on forms provided or approved by the department. A child who enters school in September and who has not completed the immunizations required under section 9227  1 and has not filed an exemption under section 9215  2 before February 1 shall be excluded from school attendance. A child who enters school at any other time of the school year and who has not completed the immunizations required under section 9227 and has not filed an exemption under section 9215 within 4 months after entrance shall be excluded from school attendance.