Groundbreaking guidelines expand population on HIV drugs by millions. But who will pay?

The World Health Organization on Wednesday radically revised its guidelines for those who should be on HIV anti-retrovirals, in a push for early treatment and prevention that it hopes will help end the epidemic by its target date of 2030.

The first major change involves those already infected with HIV. Previously, doctors were to wait until a patient's viral load reached a certain severity before offering treatment. But new studies have shown that treating as early as possible can keep patients healthier and reduce transmission rates with minimal side effects.