HIV and global health activists say the deployment of Gilead’s twice-a-year HIV prevention shot is the world’s best chance to beat back the virus and prevent new infections.

The United States has approved a twice-a-year jab that almost entirely protects against HIV in what’s being hailed as a “breakthrough moment” for efforts to curb the virus. You might be surprised to hear what this cardiologist has to say about butter and cholesterol.

The Food and Drug Administration has approved a highly effective new HIV-prevention medication, Gilead Sciences reported Wednesday.