41.   Early human tests show the drug can relieve symptoms and might be able to prevent the infection, Ossi said.

42.   Even with gas-permeable lenses, the cornea does not get quite enough oxygen to prevent infections that could cause permanent scarring and vision loss.

43.   Federal health officials advised doctors on Thursday not to prescribe a standard drug to prevent infection with the AIDS virus among healthy health care workers stuck by needles.

44.   For ethical reasons, researchers must continuously educate participants not to ease up on safer sex practices and other measures that can prevent infection without a vaccine.

45.   Furthermore, the drugs used to prevent HIV infection are the same combinations that are now proving very effective in the early treatment of HIV infections.

46.   Given by injection before exposure to the virus, it can potentially prevent infection.

47.   Good personal hygiene and careful eating habits remain the best public health measures that can be taken to prevent the infection, Alexander said.

48.   He injects the dart wound with a long-lasting antibiotic normally used to prevent mammary infections in lactating cows.

49.   He expects that its going to take a combination of vaccines, much like researchers are now recommending combination drug treatment, to actually prevent new infections.

50.   He said he expects its going to take a combination of vaccines, much like researchers are now recommending combination drug treatments, to actually prevent new infections.