At least 70 people in and around Chicago have had severe bleeding linked to synthetic cannabinoids, which is also known as synthetic marijuana.
Synthetic cannbinoids don't actually have much in common with plant-based cannabis. Here's why they can be so dangerous.
Some people are more likely to use them than others.
Anyone who has a reaction to synthetic cannabinoids should call 911 or have someone take them to the emergency department immediately, according to the Illinois Department of Health.
This post has been updated to reflect that another person has died and more cases have been identified in the outbreak.
This post has been updated to reflect that more cases have been identified in the outbreak.