Michigan StatutesAct 231 of 1955 - <font color=red>Repealed-</font>POLIOMYELITIS VACCINE (325.551 - 325.556)POLIOMYELITIS VACCINEAct 231 of 1955325.551-325.556 Repealed. 1978, Act 368, Eff. Sept. 30, 1978.