The majority of vaping illnesses in Wisconsin have been linked to THC products, the Department of Health Services said.The new information was released Thursday.Investigators said nearly 90 percent of the 27 patients with lung disease reported vaping THC.THC is the active ingredient in marijuana.Three of the patients said they did not use THC.“Vaping cartridges containing THC may include chemicals or additives that are unknown, unregulated and unsafe,” Department of Health Services Secretary-designee Andrea Palm said. “We strongly urge people not to vape.”Marijuana is illegal in Wisconsin.THC vape cartridges are not regulated or for sale in vape shops.Garrett Anderson uses and sells vape products, and believes a blanket health warning about all vaping doesn't address the real cause of what's making some people seriously ill."They're buying black market THC vape cartridges," he said."I am selling this stuff to help people get off of cigarettes, basically," Lakeshore Vapor owner Bill Giles.He said unregulated black market THC vape products are putting people in danger."Who knows where these people are making them right now? They could be making them in a garage," Giles said.Gov. Tony Evers' administration has pushed for marijuana legalization.Lt. Gov. Mandela Barnes told WISN 12 News better regulation could reduce the risk from unsafe THC vape products."The regulation kind of stops that from happening," Barnes said. "You're not seeing that in other states that are legal because there are specific measures, and there's more accountability for people who are selling THC vaporizers."Although they are illegal and potentially dangerous, many say THC vape products are popular."There are so many people that I know that are like, 'That's my vaping,'" Anderson said. "Here, because it is illegal, you have to buy it from someone who you are completely unaware of. And, who made it, where it's from, what's in it? You have no idea."He added that he doesn't think the health warning will stop customers from buying vape products.A total of 32 vaping illness cases have been reported in 14 Wisconsin counties.It's possible that 11 other cases could be related, but they have not yet been confirmed.The Department of Health Services described a case as a patient who had a history of vaping and developed severe lung disease.Wisconsin officials are working with the Food and Drug Administration and the Centers for Disease Control and Prevention to investigate.Nearly 200 cases have been reported in 22 other states.As of Tuesday, the Milwaukee Health Department said there have been 16 people hospitalized with chemical pneumonia, which causes inflammation of the lungs."Stop using any vape and/or e-cigarette devices immediately," the department said Wednesday in a news release.Symptoms of chemical pneumonia include coughing, shortness of breath, fatigue, fever, chest pain, nausea and diarrhea.Anyone experiencing symptoms is urged to contact a doctor.A vaping death was reported in Illinois last week.