Promising HIV vaccine to be tested with gay men and trans people This article is a helpful overview of Mosaico, a global HIV-prevention vaccine study enrolling 3,800 sexually active HIV-negative gay men and transgender people age 18-60. Article: http://www.aidsmap.com/news/jul-2019/promising-hiv-vaccine-be-tested-gay-men-and-trans-people Study: https://clinicaltrials.gov/ct2/show/NCT03964415