Public health versus political frontiers.
D002681:China / Q000453:epidemiology; D015658:HIV Infections / Q000453:epidemiology* / Q000209:etiology; D015497:HIV-1; D006801:Humans; D015994:Incidence; D011057:Politics; D011634:Public Health / Q000706:statistics & numerical data* / Q000639:trends; D012307:Risk Factors; D015819:Substance Abuse, Intravenous / Q000150:complications*; D013624:Taiwan / Q000453:epidemiology