What was definition previously?
It's been the same since 2018.
https://web.archive.org/web/*/https://www.merriam-webster.com/dictionary/anti-vaxxer
At some point the word 'Laws' was changed to 'Regulations', because congress isn't passing laws mandating vaccinations.
They are two different things. Regulatory agencies create regulations to enforce laws. The regulations are more detailed than the law. The law can say "The TSA can make public safety orders" and the regulations can be specific, like mask requirements.
(post is archived)