Study shows 1 in 4 teenage girls have an STD

CHICAGO — At least one in four teenage girls in the U.S. has a sexually transmitted disease (STD), amounting to 3.2 million girls, according to a first-of-its-kind study by the Centers for Disease Control and Prevention released March 11. About half of the girls admitted ever having sex, and among them, the rate of STD infection was 40 percent, researchers…