Multiple Choice
In some countries (e.g. ,sub-Saharan Africa,Thailand,India) (1) _________ of HIV-1 infections are acquired through heterosexual transmission in contrast to (2) _______ in the United States and Western Europe.
A) less than 10%
B) 25%
C) 50%
D) more than 90%
Correct Answer:

Verified
Correct Answer:
Verified
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