Don't have unprotected sex and don't share a needle with someone who's HIV positive.
NO
There are over 1 million people in the United States with HIV. There are over 33 million people that have HIV in the world.
Because you can transmit you STD's to your partner and once your baby is born it is a very strong possiblity that your child will be born with aids/hiv too.
Use of a seat belt is a way to prevent injuries in a collision.
Installing a floor drain is the only way to prevent back flow.
Eliminating exposure to textile dust is the surest way to prevent byssinosis.
There is no way to prevent tornadoes, but warning systems have been in place for decades.
The best way to prevent encopresis is to prevent constipation
There is no absolute way you can prevent flats.
Hand washing is the best way to prevent the flu.
The best way to prevent paralysis is to avoid anything that could make you paralyzed. This could compromise your way of living.
In California, forfeiting the right of way to other drivers does not prevent accidents?