That was my though too, but I was just reading somewhere that they don’t think that’s the case. Who knows. So far I have not found anyone who has had moderate to severe symptoms after both shots. The few who had them on shot 1 had next to nothing on shot 2 and those with not much on shot 1 had more of a reaction on shot 2. I know 1 person who had no reaction to either shot and they are now worried it didn’t workFrom everything I've read that seems to indicate that they previously had covid - at least in articles I'm reading and from people I've talked to. My friend's whole family had covid and all of them felt horrible with the first shot - nothing for the second.