Hearing is easily taken for granted. Unless a person has experienced temporary or permanent hearing loss, it can be hard to imagine a life in which hearing is compromised or completely lost. But that is precisely the life hundreds of millions of people across the globe live every day.

At any given moment, millions of doctors and medical researchers across the globe are working toward a singular goal: that no illness should be a death sentence. One large leap was taken toward accomplishing that goal recently, when for the second time in history an HIV patient was cured of the disease. Like the first case, the cure was a result of a bone marrow transplant intended originally to treat cancer.