When a person gets COVID-19 after being vaccinated, it is referred to as a “breakthrough case.”
Researchers found that 7.8% of vaccinated people with cannabis use disorder get a breakthrough case of COVID. In comparison, the percentage for people who don’t have a substance misuse disorder is 3.6%.
"The overall risk of COVID-19 infection among vaccinated SUD patients was low, highlighting the effectiveness and the need for full vaccination in this population," the authors wrote in the study. "However, our findings document that this group remains a vulnerable one even after vaccination." Read more.