What statement made by the patient indicates a lack of understanding of HIV transmission?

The statement reflecting a lack of understanding of HIV transmission is that as long as the patient is taking Highly Active Antiretroviral Therapy (HAART), they cannot transmit the virus to anyone else. While effective antiretroviral therapy can reduce the viral load to undetectable levels, which significantly decreases the risk of transmission, it is important to emphasize that the potential for transmission still exists. The concept of "Undetectable = Untransmittable" (U=U) applies, but it is contingent upon maintaining effective adherence to therapy and having regular viral load monitoring to ensure that levels remain undetectable.

The other statements reveal a proper understanding of HIV transmission. The awareness that breastfeeding can lead to transmission, the potential for re-infection with another strain through unprotected sex, and the acknowledgment that unprotected sex can lead to transmission indicate a clear grasp of the ways HIV can be spread. These statements show that the patient recognizes the importance of taking precautions to avoid transmitting the virus.