Some quotes from an article in LiveScience:
Marijuana May Trigger Allergies in Some People By Agata Blaszczak-Boxe, Contributing Writer | March 6, 2015
"...marijuana plants may trigger allergic reactions in some people, according to a new review of previous studies."
"...allergies to marijuana have likely gone underreported" said Dr. Purvi Parikh, an immunologist of the Allergy & Asthma Network, a nonprofit organization that promotes allergy research and education.
"People who live in areas where large quantities of marijuana plants are grown may be particularly prone to experiencing allergic reactions to the pollen", Parikh said. "The quantity makes a big difference in the prevalence of allergies."
The Who’s Roger Daltrey Curses Pot-Smoking Fans In NY, Again Julia Gray @juliagrayok | May 14, 2019