MVA.tHIVconsv3

The object of the study is to assess the safety profile of candidate vaccines ChAdOx1.tHIVconsv1, MVA.tHIVconsv3 and MVA.tHIVcnsv4 administered sequentially in healthy HIV-1/2 negative adult volunteers.
In addition, the study will assess the immune responses generated of the candidate vaccines ChAdOx1.tHIVconsv1, MV.tHIVconsv3 and MVA.tHIVconsv4 administered sequentially in healthy HIV-1/2 negative adult volunteers.
3 healthy, HIV-1 negative adult volunteers will receive one vaccination of low dose ChAdOx1.tHIVconsv1. A further 10 healthy, HIV-1 negative adult volunteers will receive a higher dose of ChAdOx1.tHIVconsv1, followed by one vaccination each of MVA.tHIVconsv3 and MVA.tHIVconsv4 4 weeks later.

This is a double blind, randomized, placebo-controlled, parallel design, study in which 24 HIV-infected participants with durable viral suppression will be randomly assigned to receive vaccination with MVA.tHIVconsv3 (M3), MVA.tHIVconsv4 (M4), M3+M4 combined, or placebo. Participants will be randomized 7:7:7:3 to one of four study arms, and receive study treatment or placebo at Day 0. Each enrolled participant will complete the study in approximately 33.5 weeks (8.4 months).
The purpose of this study is to find out:
If it is safe for people to receive injections of two investigational HIV vaccines, called MVAtHIVconsv3 and MVAtHIVconsv4 alone or in combination.
If giving participants these vaccine doses will increase their immune system's ability to kill HIV virus.