If the SpFn vaccine comes out with decent results, I’d give it a whirl. It’s the one being developed by the US Army that may offer immunity to a wide variety of Coronaviruses, not just Covid-19. https://www.usnews.com/news/health-news/articles/2021-12-22/u-s-army-reports-progress-on-covid-vaccine-that-fights-all-variants
https://www.science.org/doi/10.1126/scitranslmed.abi5735
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