Final answer:
Hepatitis B, HIV, and Tuberculosis all spread through direct transmission. HIV can be prevented by safe sex, not sharing needles, and using PrEP. Understanding transmission methods is crucial for prevention.
Step-by-step explanation:
All three diseases mentioned, Hepatitis B, HIV, and Tuberculosis, are transmitted through direct transmission. Direct transmission refers to the direct transfer of an infectious agent from one person to another. Hepatitis B can be spread through sexual contact or sharing of needles, HIV is primarily transmitted via blood, semen, vaginal fluids, and breast milk, usually during sexual intercourse or needle sharing, and Tuberculosis is an airborne disease spread by respiratory droplets when an infected person coughs or sneezes.
To protect themselves from HIV, individuals can practice safe sex using condoms, avoid sharing needles, and for those at high risk, consider pre-exposure prophylaxis (PrEP). Knowing how HIV transmission occurs helps in making informed decisions to prevent infection. While HIV is the most widespread of the three viruses globally, all are serious communicable diseases that require proactive measures to prevent.