He's covered in tattoos.
Did his teammates freak out each time he got one, since there's a certain chance that the process infected him with hepatitis, which can be spread through the team?
Of course not. Because this isn't really about safety. Most of them know he's no threat. Hell, some of them know they're probably the bigger threat, being vaccinated instead of naturally immune. They know it's about control but they go along with it anyway. Millions of dollars can do that.
!LUV for Irving - good job standing in your power!!