By IndyKids Staff
Reports released in September about a medical study in Thailand for an HIV vaccine were encouraging at first. HIV stands for “human immunodeficiency virus” and leads to AIDS (acquired immunodeficiency syndrome), a lifethreatening disease which, according to the United Nations, kills two million people a year. Later data showed the vaccine was not so effective in preventing HIV infection. So far, the search for a vaccine to prevent AIDS has been mostly unsuccessful.