“Cannabinoids can modulate immune reactions in the periphery but also in the brain, influence T cell subset balance and cytokine expression and play a role in the balance between neuroinflammation and neurodegeneration. Immune cells can synthesize endocannabinoids and also be influenced by cannabinoid analogues.”
Tanasescu, R., & Constantinescu, C. S. (2010). Cannabinoids and the immune system: An overview. Immunobiology, 215(8), 588-597. doi:10.1016/j.imbio.2009.12.005