1.   Even before the antibody test is positive, the victim can pass the virus to others by methods that will be explained.

2.   Although the virus is passed between mosquitoes and birds, only mosquitoes pass it on to people.

3.   Because antiviral drugs have extended so many lives, there are now more infected people who can pass the virus along to others.

4.   Because the virus is usually passed from mother to child, this happens infrequently.

5.   By the time a person starts feeling symptoms, he or she could have passed the virus along to others.

6.   Days before his death, he learned that he had passed the virus along to his girlfriend, young Robin Scorpio.

7.   He then showed that the virus was passed naturally through successive generations of mice to cause leukemia.

8.   In the absence of preventive treatment, HIV-positive women pass the virus to their offspring about one-quarter of the time.

9.   Infected women can pass the virus to their unborn babies.

10.   More pregnant women are testing positive for HIV, and the virus is being passed more often to newborns.