RecruitingPhase 1Biological interventionA Clinical Trial to Look at the Safety and Immune Responses of the RNA-based Vaccine BNT168 in Adults Living With or Without HIVThis study will test a new ribonucleic acid (RNA)-based vaccine called BNT168 in adults living both with and without human immunodeficiency virus (HIV), to see how safe it is, how well it triggers the body's immune response and how it affects the amount of virus in the body.