The difficulty in estimating the number of cases of HIV/AIDS among adolescents is that

A. most infected adolescents do not seek treatment so they are never counted.
B. some adolescents who initially show symptoms do not go on to develop the disease.
C. HIV/AIDS is often mistaken for another bacterial infection among young people.
D. the infection takes about 10 years to develop so an infected adolescent may not show symptoms until he or she is in their 20s.


Answer: D

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