Must d partner b infected with hiv before the other one can be also infected
For HIV transmission to occur there must be someone who is HIV positive. So if there is transmission of HIV between partners, it means that one of them was already infected with HIV and the partners engaged in unprotected sexual contact, anal, vaginal or oral sex.
Check out this article for more information: https://lovemattersafrica.com/safe-sex/stds-stis/hiv
Love Matters Team.