Illinois is the latest state to file a lawsuit against e-cigarette maker Juul, alleging the company undid "years of progress made to reduce youth smoking rates."

The lawsuit, filed by Illinois Attorney General Kwame Raoul on Thursday, alleges Juul used a "sleek, easy-to-conceal e-cigarette" combined with fruity flavors that masked a less harsh nicotine solution that it marketed to minors. Juul's e-cigarette device resembles a USB flash drive, can be charged via a USB port, and can be used discreetly, all features that make Juul's device more appealing to youth, according to the lawsuit. [...]