The one that is available. The clinic said “We have this fine 2021 Moderna available today” and I replied “ok, I will take that.”
FYI, per a trusted Doctor, they had not been able to EVER get these past the animal testing phase (look it up. It’s 100%true) The only way you could test it on humans was Emergency Use Authorization (EAU). It’s basicallly “Right to try” as in “ the medicine might kill you but if you take it, you have a chance to survive”. I’m seeing people who are not sick or dying willingly line up to be lab rats! Imagine that!