title: HIV-STD synergy worries public health officials. Drugs, Viagra play role in problem.
abstract: There is too little good news about sexually transmitted diseases (STDs) and sexual risk-taking behavior in the United States, and that continues to worry public health officials and HIV researchers.
mesh_terms: D015658:HIV Infections / Q000150:complications* / Q000453:epidemiology; D006558:Herpes Genitalis / Q000453:epidemiology; D006801:Humans; D010879:Piperazines / Q000009:adverse effects*; D011634:Public Health; D011687:Purines; D012749:Sexually Transmitted Diseases / Q000150:complications* / Q000453:epidemiology; D000068677:Sildenafil Citrate; D013450:Sulfones; D014481:United States / Q000453:epidemiology
chemical_list: D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate