<p>(CNN) The city of Milwaukee issued a stern warning to residents: Stop vaping immediately.
<p>The advisory came after 16 people in Wisconsin were hospitalized with chemical pneumonia, a severe illness that causes lung inflammation, the Milwaukee health department said.
<p>All of them reported vaping or “dabbing”–inhaling potent marijuana products–before they were hospitalized, the department said.
<p>The link between vaping and respiratory illness isn’t fully understood, officials said, but in the meantime, they’re advising residents to stop using vapes, e-cigarettes and liquid THC products.
