Take a look at this:
https://herb.co/news/health/cannabis-weaken-strengthen-immune-system/“Preclinical research has found that cannabis can suppress the immune system. It does this by decreasing inflammation, which is the body’s natural response to infection.
While inflammation has a bad reputation, no human would be able to survive without it. Inflammation helps trap and isolate damaged parts of the body, preventing the spread of infection. Decreasing inflammation when it is needed can potentially worsen infection or injury.
However, sometimes the body’s inflammatory response goes awry and it becomes too inflamed for its own good. Such is the case with autoimmune disease, in which the immune system begins to attack a patient’s own body. This causes chronic inflammation, which can be detrimental to health.”
“As a powerful anti-inflammatory, the immune suppressant qualities of cannabis may be useful for those who have health problems associated with high levels of inflammation.”