Texas Administrative Code
Title 25 - HEALTH SERVICES
Part 1 - DEPARTMENT OF STATE HEALTH SERVICES
Chapter 97 - COMMUNICABLE DISEASES
Subchapter B - IMMUNIZATION REQUIREMENTS IN TEXAS ELEMENTARY AND SECONDARY SCHOOLS AND INSTITUTIONS OF HIGHER EDUCATION
Section 97.65 - Exceptions to Immunization Requirements (Verification of Immunity/History of Illness)

(a) Serologic confirmations of immunity to measles, rubella, mumps, hepatitis A, hepatitis B, or varicella, are acceptable. Evidence of measles, rubella, mumps, hepatitis A, or hepatitis B, or varicella illnesses must consist of a valid laboratory report that indicates confirmation of either immunity or infection.

(b) A written statement from a parent (or legal guardian or managing conservator), school nurse, or physician attesting to a child's/student's positive history of varicella disease (chickenpox), or of varicella immunity, is acceptable in lieu of a vaccine record for that disease (see form at http://www.dshs.state.tx.us/immunize/docs/c-9.pdf).