410 ILCS 315/1.10
The Department of Public Health shall adopt a rule requiring students, upon entering the 6th and 12th grade of any public, private, or parochial school, to receive an immunization containing meningococcal conjugate vaccine that meets the standards approved by the U.S. Public Health Service for such biological products and is in accordance with the recommendations of the Centers for Disease Control and Prevention's Advisory Committee on Immunization Practices. The immunization shall consist of one dose of the MCV4 vaccine for 6th grade entrance and 2 doses for 12th grade entrance, unless the first dose was administered to a child who was 16 years of age or older, in which case only one dose is required at 12th grade entrance. However, if the Centers for Disease Control and Prevention Advisory Committee on Immunization Practices' recommendations for adolescents are updated, then the requirement under this Section should reflect those changes to be current. The immunization requirement shall not apply before 6 months after final rules are approved. Existing Illinois standards for parental or legal guardian objections or medical objections shall be applicable.
410 ILCS 315/1.10