Texas implemented a new law on August 1 that complies with a recommendation from the Centers for Disease Control and Prevention that all children in counties with a hepatitis A infection rate of 20 cases per 100,000 people be vaccinated against the disease. The 10-year average hepatitis A rate in Bexar County is 20 cases per 100,000 people, which means that students there must get the vaccine before returning to school or day-care centers this fall. The state law also makes the hepatitis A vaccine mandatory for children born after Sept. 2, 1992. Bexar County schools require one of the two hepatitis A immunizations by the beginning of the school year, with the second shot following in six months.