What is the ideal thing to prevent AIDS (through sexual transmission)?

In a like India, it would be ideal to use barrier contraceptive devices like the condom, which may offer protection against infection as well as conception.

How can parents help their children in avoid AIDS?

Parents should educate their children about AIDS so that when they become sexually active they know exactly what risks they are taking. Just moralizing does not help to persuade people in changing their behavior. It must be emphasized that there is no cure for AIDS; at the same time one should also emphasize that it is not transmitted via casual contacts, like serving meals, giving hair cuts, shaking hands, using public toilets or swimming pools. Early and accurate information is absolutely essential in the prevention of AIDS, as well as, unnecessary panic and anxiety.