Section 18-328 - Definitions(a) In Part V of this subtitle, the following words have the meanings indicated.(b) "Health care provider" means any licensed health care professional, organization, or institution, whether public or private, under whose authority pertussis vaccine is administered.(c) "Major adverse reaction" means: (1) Any serious illness, disability, or impairment of mental, emotional, behavioral, or physical functioning or development, the first manifestation of which appears within 7 days after the date of administration of pertussis vaccine and for which there is reasonable scientific or medical evidence that pertussis vaccine causes, or significantly contributes to, such effect; and(2) Any other reaction, which the Department, after consultation with the Medical and Chirurgical Faculty of Maryland, determines by guideline is a basis for not continuing with pertussis vaccine administration.(d) "Pertussis vaccine" means any vaccine that contains materials intended to prevent the occurrence of pertussis, whether or not the materials are administered separately or in conjunction with other materials intended to prevent the occurrence of other diseases.