Thymoquinone, which is a compound found in Nigella Sativa plant, is being researched as a possible treatment against lung infection caused by Covid-19.

For you to explore further, listed below are a couple of related articles:

A promising new treatment for COVID-19 infection | University of Technology Sydney (uts.edu.au)

The role of thymoquinone, a major constituent of Nigella sativa, in the treatment of inflammatory and infectious diseases - Fatima Shad - 2021 - Clinical and Experimental Pharmacology and Physiology - Wiley Online Library