1. a) Proof of immunity shall consist of documented evidence of the child having received a vaccine (verified by a health care provider, defined as a physician, child care or school health professional, or health official) or proof of disease (as described in subsection (e), (f) or (g) or documentation of laboratory evidence of immunity to a specific disease (as described in subsection (c), (d), (e) or (g)). As used in this Section, "physician" (see Section 665.130) means a physician licensed to practice medicine in all of its branches (M.D., D.O.).
2. b) Day and month is required if it cannot otherwise be determined that the vaccine was given after the minimum interval or age.
3. c) Proof of prior measles disease shall be verified with date of illness signed by a physician or laboratory evidence of measles immunity. A diagnosis of measles disease made by a physician on or after July 1, 2002 must be confirmed by laboratory evidence.
4. d) The only acceptable proof of immunity for rubella is evidence of vaccine (dates, see subsection (b)) or laboratory evidence of rubella immunity.
5. e) Proof of prior mumps disease shall be verified with date of illness signed by a physician or laboratory evidence of mumps immunity.
6. f) Proof of prior or current hepatitis B infection shall be verified by laboratory evidence. Laboratory evidence of prior or current hepatitis B infection is acceptable only if one of the following serologic tests indicates positivity: HBsAg, anti-HBc or anti-HBs.

7. g) Proof of prior varicella disease shall be verified with:

   1. 1) date of illness signed by a physician; or
   2. 2) a health care provider's interpretation that a parent's or legal guardian's description of varicella disease history is indicative of past infection; or
   3. 3) laboratory evidence of varicella immunity.

(Source: Amended at 41 Ill. Reg. 2973, effective February 27, 2017)