Why is not possible for HIV to be transmitted through the air or by the sharing of eating utensils with an infected person?

HIV is primarily transmitted through specific body fluids such as blood, semen, vaginal fluids, and breast milk, and it requires direct access to the bloodstream or mucous membranes to infect a person. The virus cannot survive long outside the human body, making airborne transmission impossible. Additionally, saliva contains enzymes that deactivate HIV, so sharing eating utensils does not facilitate transmission. Thus, the modes of transmission are limited to intimate contact or exposure to infected bodily fluids.