https://interestingengineering.com/cannabis-might-block-covid-19-infection-study-shows
CBD performed the best
In order to conduct the study, the researchers developed over 400 new cannabis Sativa lines and extracts. The end-strains were high in anti-inflammatory cannabinoid cannabidiol (CBD) since the compound has been proposed to have anti-inflammatory and anti-cancer properties.
By using artificial human 3-D tissue models, they simulated and mapped out how each strain may impact COVID-19 infections in the human oral, airway, and intestinal tissues. Particularly, they monitored each strain's ability to modulate ACE2 levels, an enzyme previously linked to COVID-19 infection.
The lead researcher, biological scientist Dr. Igor Kovalchuk stated some strains showed promising results in ensuring less fertile ground for the virus to take root.
Some reduced the virus receptors by 73%
According to Kovalchuk, "A number of them have reduced the number of these (virus) receptors by 73 percent, the chance of it getting in is much lower. If they can reduce the number of receptors, there’s much less chance of getting infected.”