there ARE people who will keep yelling VACCINE VACCINE VACCINE because they are intentionally blurring those lines.

That's been a standard leftist tactic for generations. They used it on "phobia", "fundamentalist", and "extremist", among many others. Apply the word wrongly, insist that this is what the word always meant, if called out insist that this is what the word means NOW because that was like four or five days ago, and finally use the dispute to marginalize and disqualify anyone who disagrees because "yer wunna dem [misused labels], aintcha".