File - In this Aug. 28, 2019, file photo, a man exhales while smoking an e-cigarette in Portland, Maine. Oregon's public health physician said Wednesday, Sept. 4, 2019, that a person who contracted a severe respiratory illness and died after using…
FILE - A man exhales while smoking an e-cigarette in Portland, Maine, Aug. 28, 2019.

NEW YORK - The epidemic of severe lung illness related to e-cigarettes continues to grow, federal officials say, as they try to pinpoint the exact cause.

The Centers for Disease Control and Prevention said as of Thursday there were 805 cases of confirmed or suspected vaping-related lung illnesses in 46 states and the Virgin Islands — up more than 200 since last week. Twelve deaths are reported.

Many of the victims say they used vaping products containing THC, the compound in marijuana that causes the high. But others say they only vaped nicotine.

FILE - In this Sept. 16, 2019 file photo flavored vaping solutions are shown in a window display at a vape and smoke shop, in New York. Michigan has joined New York in banning the sale of flavored e-cigarettes as federal health officials investigate…
US Official Expects 'Hundreds More' Cases of Vaping Illness
The Centers for Disease Control and Prevention is investigating little-understood outbreak but has not yet identified a common electronic cigarette or ingredient

The CDC is urging everyone to stop using e-cigarettes, but several states are not waiting for federal officials to take stronger action.

Massachusetts this week became the first state to temporarily ban all retail and online sales of e-cigarettes. The ban is set to last for four months.

Other states have stopped the sale of flavored vaping products, saying the fruit and candy flavors appeal to young people.

The largest e-cigarette maker, JUUL, announced this week it will stop advertising its products.

E-cigarettes heat up liquid inside a cartridge and create a nicotine-filled vapor.

Federal officials have ordered JUUL to stop marketing e-cigarettes as a safer alternative to smoking tobacco cigarettes, saying such claims have never been proved.

They also strongly recommend e-cigarettes users not go back to regular cigarettes and to seek help if they have trouble quitting smoking.