Vampires have been doing this for millennia right? Seriously though, does putting Tom Hanks’ blood plasma into a young coronavirus nurse age them a little bit?

Vampires have been doing this for millennia right? Seriously though, does putting Tom Hanks’ blood plasma into a young coronavirus nurse age them a little bit? Does the effect work in reverse? (Just to explain the above Tom Hanks had Covid and gave plasma in a convalescent serum).