I don't know what you see, and whether "here" refers to DDF or to Israel, but your statement seems to oversimplify things and make them Black and White, ignoring all shades and nuances.
For example, there are many (myself included) who recovered from COVID-19 and THEREFORE will not take any COVID-19 vaccine in the near future, simultaneously urging those whom they believe are at risk and have not previously recovered from COVID-19 to get vaccinated ASAP (case-in-point: there's a high risk individual who splits his life between Brooklyn and EY and is often a guest at my Shabbos table. After speding almost a year in EY, he showed up again here about two weeks ago. I urged him to take the first flight back to EY so that he gets vaccinated, rather than wait until he can get one in NY. All that while I wouldn't consider getting vaccinated myself).
And while I'm not sure what you mean by "Corona denialists", but that might be lumping together a wide spectrum of opinions, and labeling them in an inappropriate way.
Here is Israel.
Denialists are (this may be a tad too broad) anyone who denies that corona exists or the like. (Its not dangerous at all or the only people who died from Corona were killed by the doctors...)
My observation was that the denialists are anti vax, not that anti vax are denialist.
Go read the Pshkevilim on the walls of JLM, or talk to a Yerushalmi, or Pelegist and you'll might understand where the observation comes from.
(BTW some of the Anti Vax propaganda here is based on absolute rubbish and zero understanding of science. One pashkevill trumpeted the claim that the vaccine is deadly because… in the clinical trials some people died in the control group
I have recovered from corona, and also will therefore not take the vaccine. Some of my (low risk) relatives are being urged to take it because they're teachers, and asked me what I thought about it. I told them that I think it prudent for low risk people who are still of childbearing age to allow people who are desperate to get it to take it before them...in other words give it time...at least till there's some data on the affect on fertility, birth defects...
But this doesn't make me anti vax, it makes me cautious. Anti vax is the hashkafa that its asur to take (this) vaccine.