Which statement about the human immunodeficiency virus (HIV) is true?
A. There are currently no effective drug therapies to reduce the chance of prenatal virus transmission.
B. In developing countries, more than half of all new HIV infections affect women.
C. About 30 percent of new HIV infections occur in developing countries.
D. Untreated HIV-infected expectant mothers pass the virus to their fetus approximately 30 percent of the time.
Answer: B
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