Seroprevalence has been measured at 74% for Ultra-Orthodox Jewish populations in the UK.
Its not a surprise that ethnic and religious minorities are anti-vaxx - many of them already had COVID.
I'm anti-mandatory vaccinations for the same reason, as a COVID survivor. All the evidence is showing that this natural immunity is superior to vaccines, but I'm treated like a second-class citizen.
Does it? The evidence I've seen indicates that it's robust, but not necessarily superior to vaccines.
There are biological reasons & theories why naturally acquired immunity may be more robust to variants (immune system learns to target a variety of markers/proteins of the virus, compared to the highly targeted immune response to the spike protein based mRNA vaccines). However to my knowledge there is no conclusive evidence of this yet in the literature on SARS-CoV-2.
[1] SARS-CoV-2 infection induces long-lived bone marrow plasma cells in humans https://www.nature.com/articles/s41586-021-03647-4.pdf
[2] Necessity of COVID-19 vaccination in previously infected individuals https://www.medrxiv.org/content/10.1101/2021.06.01.21258176v...