Medical Discovery News, April 19, 2008 Saturday's edition of Medical Discovery News, by UTMB Professors Norbert Herzog and David Niesel, focused on chlamydia. Chlamydia is known as a "silent" disease because 75 percent of infected women and half of infected men have no symptoms. Medical Discovery News airs at 10 a.m. on KUHF-FM in Houston. The program is aired by 48 radio stations.