I've collected the results from all 4 papers including the links to all 4 in a Google spreadsheet for easily lining up the results for each stage of Covid: https://docs.google.com/spreadsheets/d/1a5twV0x-TlHzd2AVr9e1... 1 tab for the links & underlying number of studies/patients & 1 tab for the results.

I put extended analysis of the results & caveats of what it means (correlation vs causation, etc.) on Twitter: https://twitter.com/KarlPfleger/status/1557814485070409728

4 big systematic meta-analyses since Dec'21. Consistent results from all 4: Low D levels or not supplementing D has 1.5x-3x worse Covid risk at all stages (infection to mortality).