This one...
https://jamanetwork.com/journals/jama/article-abstract/196389
Or this one...
https://www.sciencedirect.com/science/article/pii/S0009308402001597
Interesting. I just spent a few minutes researching this, and it’s true.
Pot does suppress your immune system.
So. Marijuana has certain health benefits. And certain health risks.
All in all, the risks outweigh the benefits.