Several deaths and potentially hundreds of illnesses have been tied to e-cigarettes, which allow users to inhale nicotine vapor, often flavored, without smoking.
Lawsuits have been filed against e-cigarette maker Juul and more are expected amid increasing scrutiny.
The following is a summary of how the litigation is playing out across the United States:
About 30 lawsuits have been filed over vaping-related injuries in courts around the country, including both individual lawsuits and class actions.
The lawsuits target Juul Labs Inc, which controls about 75% of the e-cigarette market.