It sounds like you don't want to say that you think vaccines are generally safe. So, I'm going to go ahead and call you an anti-vaxxer.

Generally safe is meaningless in this context. That's not a reasonable way to talk about entire classes of drugs. All that matters is for a given person with a given medical history and context, does the specific drug have a net benefit.

Here's a good test case: have you had the rabies vaccine? If not, does that make you an antivaxxer? How about vaccines that have been pulled off the market? Are those no longer vaccines?

Something reasonable to say would be there are vaccines that have a net benefit, and you should take those if that applies to your situation.

This whole "say the slogan or you're an antivaxxer" is like giving kids the nontoxic glue because you know some of them are going to eat it. The adults in the room don't need this shit.