Four Decades On, Where's The HIV Vaccine?
In the four decades since the first cases of what would come to be known as acquired immunodeficiency syndrome (AIDS) were documented, scientists have made huge strides in human immunodeficiency virus (HIV) treatment, transforming what was once a death sentence to a manageable condition.What we still don't have is a vaccine that would train human immune systems to ward off the infection before it ever takes root.Here's the state of play on some of these efforts, which experts see as