Final answer:
The most common and most deadly coinfection for HIV-positive individuals is Tuberculosis (TB), which is particularly severe due to the compromised immune system caused by HIV.
Step-by-step explanation:
The most common and most deadly coinfection for HIV-positive individuals is d. Tuberculosis (TB). When people are infected with HIV, they are more vulnerable to certain infections and diseases due to the weakening of their immune system. Opportunistic infections such as TB, pneumocystis pneumonia, and esophageal candidiasis occur more frequently and can be particularly severe. TB is a leading cause of mortality among people with HIV, reflecting its status as a global epidemic with substantial mortality in the context of HIV/AIDS. Strategies for preventing the transmission of HIV include avoiding exposure to the virus through safe sex practices and not sharing needles.