Exclusions from compliance are allowable on an individual basis for medical contraindications, religious conflicts, and active duty with the armed forces of the United States. Children and students in these categories must submit evidence for exclusion from compliance as specified in Texas Education Code, Chapter 38 and the Human Resources Code, Chapter 42.

(1) Medical contraindications. The child or student must present an affidavit or certificate signed by a physician, duly registered and licensed to practice medicine in the United States, in which it is stated that, in the physician's opinion, the immunization required would be injurious to be the health and well-being of the applicant or any member of his or her family or household. Unless a lifelong condition is specified, the affidavit or certificate is valid for only one year from the date signed by the physician and must be renewed every year for the exclusion to remain in effect.

(2) Religious conflicts. A signed affidavit must be presented by the child's parent or guardian stating that the immunization conflicts with the tenets and practices of a recognized religious organization of which the applicant is an adherent or member. This exemption does not apply in times of emergency or outbreak declared by the commissioner of health or local health authority.

(3) Armed forces. Persons who can prove that they are serving on active duty with the armed forces of the United States are exempted form the requirements in these sections.

Requirements for polio, measles, rubella, mumps, and varicella vaccines are waived during pregnancy. Pregnancy is not a medical contraindication for administration of tetanus/diphtheria toxoids.

Section 97.63 of this title (relating to Required Immunizations) states that serologic confirmation of immunity to measles, rubella, mumps, hepatitis A, or hepatitis B are acceptable in lieu of vaccine against the serologically confirmed disease. If a child or student is unable to submit serological proof of immunity or serologic evidence of infection, then measles, rubella, mumps, hepatitis A, or hepatitis B vaccine is required. Evidence of measles, rubella, mumps, hepatitis A, or hepatitis B illnesses must consist of a laboratory report indicating confirmation of immunity or confirmation of infection. The school shall accurately record the results of any serologic tests supplied as proof of immunity. The original should be returned to the child/student or the child's/student's parent or guardian. All histories of varicella illness must be supported by a written statement from a physician or the child's/student's parent or guardian containing wording such as: "This is to verify that (name of student) had varicella disease (chickenpox) on or about (date) and does not need varicella vaccine." or by serologic confirmation of varicella immunity. School nurses may also write this statement to document cases of chickenpox that they observe. The school shall accurately record the existence of any statements attesting to previous varicella illness or the results of any serologic tests supplied as proof of immunity. The original should be returned to the child/student or the child's/student's parent or guardian. If a child or student is unable to submit such a statement or serologic evidence, varicella vaccine is required.