Answer:
HIV infection is a sexually transmitted disease which means it can transfer from one person to another from sexual contact with an infected person. As HIV spread through the transfer of body fluids therefore blood transfusion, sharing the same needles and shaving blades can also transfer HIV to a healthy person.
So the behaviors that protect us from HIV are using protection during intercourse, having fewer sexual partners, using fresh syringes by drug addicts, prevent using used blades for saving, avoiding tattoo with the same piercing syringe, avoiding contact with blood or body fluid or other person.
