The Cannabis Control Commission and the Department of Public Health have agreed to share data with each other to investigate whether six probable cases of vaping-related lung illnesses are linked to state-licensed marijuana retailers, as health officials had suggested last week.

But neither could provide information on Monday as to which businesses have sold products that might have sickened people.

The agreement follows a report released Thursday identifying five probable cases in which patients had vaped only THC products that had been purchased from licensed dispensaries in Massachusetts. One other probable case involved a patient who reported vaping nicotine and THC, also from products purchased at a legal shop.

The report includes data from interviews with patients conducted through Nov. 22.

DPH staff say they’ve identified several dispensaries linked to the probable cases, but the names of businesses were not immediately available over email Monday.

The commission also did not release the names, citing the ongoing investigation, according to a spokeswoman.

“The (Commission) on Friday entered into a data sharing agreement with (DPH) to obtain information regarding the dispensaries identified over the course of their interviews with some probable lung injury cases,” the spokeswoman said. “Although the terms do not allow for the disclosure of details pertaining to an ongoing investigation at this time, the agreement will further the commission’s examination of products that may contain vitamin E acetate or other contaminants of concern and help determine whether any items sold by Massachusetts licensees may be implicated.”

The CCC quarantined all THC-based vape products earlier this month with the exception marijuana flower vapes for medical marijuana cardholders. The commission’s quarantine took effect on the day Gov. Charlie Baker’s vape ban on medical marijuana vape products was set to lift. The blanket ban on vaping products is scheduled to lift on Dec. 11.

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