I think you know the question. Moderna, Pfizer or J&J shots can’t help someone who has Covid-19. It was tweeted by an ER nurse. The first line of defense against Covid-19 is vaccination. In the US, it is free and widely available. Yes, there is great progress being made on Covid-19 treatments, but I rather not get Covid-19 to begin with and a hospital bed is a lousy place to be trying to see what’s available.