It’s hiding in plain sight.
The link between xenophobia, racism and the anti-vaccer mentality.
“The anti-vax movement has, in short, become a magnet for people engaged in anti-truth and anti-science politics, and an open conduit to the extreme right.” See <link>.
For many years, various countries have refused entry to travellers who cannot show proof of medication / vaccination for e.g., malaria, meningitis, yellow fever etc.
Did the covid freedom fighters miss those great injustices – or do they only get excited about covid vaccines?
Selective / opportunistic outrage? Or, given how xenophobic and narrow-minded they tend to be, perhaps the banal truth is that most anti-vaccers have never travelled anywhere needing a jab in the first place.