Our travel clinic is here to give you the shots you need before leaving the country. By offering first-class care and education in a variety of vaccine-related services, we've earned the name "the vaccine people." Passport Health of Austin and San Antonio is a locally-owned branch of Passport Health. Founded in 1994, Passport Health is the largest provider of travel medicine and immunization services in the United States. With over 200 locations across the country – including seven in Central Texas – the medical professionals at Passport Health have earned the name “the vaccine people” by providing nationally recognized immunization services for business, school, international travel, immigration, military readiness, disaster relief and bio-terrorism response.