New concerns have emerged over antiretroviral drugs used in the fight against HIV/AIDS.

The drugs, typically a cocktail of three or more drugs in a single dose, are chosen from 27 possible pharmaceuticals.

They’re designed to suppress the virus in the body, and often keeping the viral load low enough to make transmission more difficult. The drugs have been a miracle for millions of sufferers.

But there are concernd that they could cause the virus to mutate and might help the virus evolve into an untreateable resistant form.

Al Jazeera's Jacob Ward reports from San Francisco.

Source: Al Jazeera