This is a great question. Keep us posted! It's my understanding that the Pfizer vaccine is not a live vaccine, not a dead vaccine either. But an entirely new approach using our own genetic RNA to build our own virus busting antibodies and as such are better and safer opening the door to the future of vaccines. I told my rheumy I want this thing in my arm ASAP. I only hope the sorry anti-vaxers will zip it up and let our amazing scientists and virologists do their jobs.