These are risks like HIV infection, malnutrition, diabetes, smoking, alcohol and substance abuse, indoor air pollution and, above all, limited access to basic care for the poorest people.

Infection control for airborne pathogens must improve in hospitals and other congregate settings, especially where HIV/AIDS is widespread.

Second, the AIDS virus in vitro environment is very fragile and can easily be killed, the AIDS virus does not pass the air , Food, water and so on the daily life of the general contact.