Cutting to the chase: Does anyone have any scientific study on the duration of natural immunity?

Long story: My NYC private school employer has stated that the Archdiocese requires proof of Covid shots or weekly testing showing negative results. I'm not jabbed and had Covid in August. I am refusing weekly testing for a number of reasons: . I don't want my nasal cavity probed every 7 days . I have natural immunity . "Vaxxed" people can spread the virus too so if I should be tested they should be tested.

I told my employers and they recommended I write the Arch, which I did. I informed my employer that, until I get a reply supporting their request with scientific backing, I will not be complying with their demands. They are ok with this!

It's been 4 days, no response from the Arch.

I also want to take this time to thank you all for being so informative. I would not have resisted this far without you!