Gilead Sciences chairman and CEO Daniel O’Day joins 'Squawk Box' to discuss the FDA approval of the company's HIV prevention ...

Yeztugo showed promising results in clinical trials. One study involving women in Africa reported 100% efficacy, with zero ...

Yeztugo, approved by the FDA, was highly effective in two randomized trials. It costs $28,218 per year, and people have to be HIV-negative to get it.