A new study has shed gentle on how sparking up a cigarette could presumably be causing one other lethal health problem. Another H.I.V. Vaccine Fails a Trial, Disappointing ResearchersAfter greater than 30 years of research, 1.7 million people are still contaminated every year with the virus that causes AIDS. An Experimental H.I.V. Vaccine Fails in AfricaResearchers ended a large trial in South Africa after finding that an experimental vaccine provided little protection.
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