Strictly speaking, we don’t have much evidence suggesting that cannabis can prevent a coronavirus infection.
In fact, smoking cannabis may make people more susceptible to infection. Dr. Donald Tashkin, a UCLA professor who has extensively studied cannabis’ effects on the lungs, previously found evidence that cannabis smoking temporarily increases the symptoms of bronchitis such as inflammation in the lungs, coughing, and phlegm production. While these effects were much less serious than those found for tobacco, Tashkin told the Los Angeles Times in April that “smoking anything increases risk.”
All the doctors we spoke with agreed that avoiding smoking is a good idea right now. “In general, I would suggest much less smoking,” advises Dr. Frank Lucido, a GP and cannabis clinician. “Since COVID-19 deaths are respiratory deaths, it’s best to avoid even cannabis smoke in this case.”
To read more, click on https://www.leafly.com/news/health/can-cannabis-prevent-or-cure-the-coronavirus-the-data-look-dubious