21.   Adolescent girls and boys are now among those at the highest risk of HIV infection due to having unprotected sex or sharing contaminated needles while injecting drugs.

22.   Adolescent girls and boys are now among those at the highest risk of HIV infection from having unprotected sex or sharing contaminated needles.

23.   AIDS also is spread by sexual contact, infected blood and sharing contaminated needles or syringes among drug abusers.

24.   AIDS is spread most often through sexual contact, contaminated needles or syringes shared by drug users, or infected blood products.

25.   AIDS is spread through sexual contact, contaminated needles shared by drug users, and infected blood or blood products and from pregnant women to their offspring.

26.   AIDS is also spread through contaminated needles or syringes shared by drug users, and infected blood.

27.   AIDS is most commonly spread through sexual contact, contaminated needles shared by drug users, infected blood or blood products and from pregnant women to their offspring.

28.   AIDS, which wrecks the immune system, also is spread by sexual contact, infected blood and sharing contaminated needles or syringes among drug abusers.

29.   Citing unnamed government and AIDS experts, Xinhua said that sharing of contaminated needles among drug users accounted for the majority of HIV cases.

30.   Ellen Dayton, a nurse in San Francisco, was stuck by a contaminated needle three years ago.