US-Mexican border is porous when it comes to AIDS.
D004641:Emigration and Immigration; D015658:HIV Infections / Q000453:epidemiology / Q000517:prevention & control* / Q000635:transmission*; D006801:Humans; D007391:International Cooperation; D008800:Mexico / Q000453:epidemiology; D011634:Public Health; D014481:United States / Q000453:epidemiology