To be clear, I'm not entirely sure what her stance on vaccines are, because she's not someone I would pin as being antivax. She's not been outspoken over it either way, but by the time she would have qualified for vaccine was around the time she found out she was pregnant and I assumed she did not get the vaccine out of concern for that (even though pregnant people can and should get the vaccine)
I've had to re-examine my friendships with some people over all this. I haven't had a moment where I snapped at anyone yet but I've come close. It's all exhausting. I'm sorry you had to deal with that.