COVID-19 alternative treatments - real-time database
https://c19early.com/

Full details at the source
Recent snapshots by VitaminDWiki


See also VitaminDWiki
Ivermectin and COVID-19 - many studies
Vitamin D meta-analyses for COVID-19
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COVID-19 treated by Vitamin D - studies, reports, videos
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Overview of reviews of COVID-19 and vitamin D, etc. – April 2021


Items in both categories Virus and Zinc:
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