jayembee
Senior HTF Member
The Pfizer and Moderna vaccines are both mRNA, so they may have some crossover potential. Not that I've heard of lots of crossover, but there was one man in New Hampshire who was given a different vaccine for the second shot by mistake and no one seemed overly concerned.
Yup, that was a major story for a while here in the Hamster Shire. The accepted wisdom was that it wasn't all that big a deal, since they were both mRNA. But in the vaccination thread, I mentioned that when going for my second shot, I was given a purple card that said "Pzifer vaccine only" when checking in. In addition to the purple cards, there was a stack of green ones, and a stack of (I forget which) white or yellow ones. They were face down, so I don't know what they said, but I assume one of them said "Moderna vaccine only" and the other said "either vaccine" or "first shot" or something like that.