>save your life How do you know he wasn't already infected and thus has natural immunity? So how is this saving her or his life? Why aren't we testing for th

>save your life How do you know he wasn't already infected and thus has natural immunity? So how is this saving her or his life? Why aren't we testing for those who actually need this vaccine or not (because antibody tests don't work very well and no one wants to improve that metric because thats not where the money is)