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Scientists Take Lesson From Immune System in Hunt for HIV Vaccine

Scientists are one step closer to success in the battle against HIV with an experimental vaccine designed to retrain the body's immune system to attack the virus that causes AIDS. A vaccine has been elusive in part because the AIDS virus mutates rapidly, making it a moving target for researchers.  However, in a small fraction of people who have been infected for a couple of years, their immune systems learn to recognize the viral mutations, cranking out “broadly neutralizing...

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