News World AIDS Day 2019: 37.9M people worldwide were living with HIV at the end of 2018 December 1, 2019 Ryan W. Miller, USA TODAY Comments Off on World AIDS Day 2019: 37.9M people worldwide were living with HIV at the end of 2018 What's the difference between HIV and AIDS? Is there a cure? A vaccine? Frequently asked questions, answered, for World AIDS Day.