title: Monitoring HIV epidemics: declines in prevalence do not always mean good news.
authors.forename: Timothy
authors.initials: T
authors.lastname: Hallett
mesh_terms: D000349:Africa / Q000453:epidemiology; D004196:Disease Outbreaks; D004198:Disease Susceptibility; D005260:Female; D015658:HIV Infections / Q000453:epidemiology* / Q000635:transmission; D006801:Humans; D008297:Male; D011159:Population Surveillance