SWTOR Jedi Knight Taris Part 5 - Rakghoul Infection 

You have to right click on the companions face at the button left and then select “dismiss companion “ and then let the red dude mess you up

Bro im trying for 10 min and im not infected

Just "reset" the quest and it will work)

If you mean for this quest, you need to dismiss your companion and just let a horde of Rakghouls beat you up until the objective completes (near the Medical Hospital, north of the map)

@@Lord_Starscream_Ghost Do I have to strip my armor because it's just not working.

@@TheShrunkEd No, it just takes a while of them hitting you. Are you in the correct area?

@@Lord_Starscream_Ghost I should be if not then I dont get it

@@TheShrunkEd I just rewatched the video, i only got it when facing a horde that included a big red Rakghoul Im afraid that's all I know, it just happens