The Finnish Institute for Health and Welfare has published peer-reviewed research in the European Journal of Immunology on Sept. 24 regarding natural immunity. This suggests that natural immunity from Covid 19 persists in a useful way for at least a year. This is arguably better performance than the immunity conferred by the current vaccines. I don't much like the Epoch Times but at least they reported on the research.
Many preprints out (and some reviewed) globally showing natural infection provides significantly better protection against infection than double vaccination and unlike vaccines wanes very little, if at all over long time frames.
Which isn't really a shock given its how pretty much every other viral disease on the planet works but a concept which was ignored when SARs2 arrived.
Right through this we axed well established scientific knowledge on day 1, actively denied it for 18 months and are now "learning" that knowledge was correct all along.
"...Chris Croce, a senior associate scientist at Pfizer, admitting on camera the advantage of acquired immunity over his company’s vaccine. “You’re protected most likely for longer since it’s a natural response,” Croce revealed..."
More solid references in this RT article to the undoubted superiority of natural immunity.