Are you willing to get the Covid vaccine when offered?

I wouldn't say that. I think anti-vax is more people actively and vocally trying to stop others from getting vaccines or spreading misinformation about one or multiple types of vaccines.

A person choosing not to participate may or may not be anti-vax. The choice isn't the determining factor imo.
Anti-vax, to me, means you actively work against vaccines, like rfk and those that want to get rid of mandatory vaccinations for school age children. We are already seeing whooping cough cases! Measles, chickenpox! Only a matter of time before we have to pull the iron lungs out of storage.