In the United States, which of the following behaviors is associated with the highest rate of HIV infections?

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In the United States, the highest rate of HIV infections is associated with intravenous (I.V.) drug use, as sharing needles and equipment with an HIV-infected person can transmit the virus. While homosexual sex and heterosexual sex can also result in HIV transmission, the rate of transmission through I.V. drug use is much higher. Contaminated blood products are no longer a significant source of HIV transmission in the United States due to improved blood screening methods.

In the United States, Which of the Following Behaviors Is