Which age group has the highest HIV/AIDS prevalence mentioned?

• A. 0-18 years
• B. 19-49 years
• C. 70+ years
• D. 50-69 years

Answer: (B)

HIV prevalence tends to be highest among adults who are most sexually active, because transmission mainly occurs through sexual contact. The 19–49 age group covers the peak years of sexual activity and partner change, so it typically shows the greatest proportion of people living with HIV in the population. Younger groups (0–18) have lower prevalence due to limited sexual exposure, while older groups (50–69 and 70+) often have lower numbers because exposure declines and, in many places, mortality reduces the number living with HIV in those ages. So the 19–49 years group best fits the pattern of highest HIV prevalence.