Massachusetts imposed a four-month ban on sales of all vaping products, amid what officials called a national public health emergency that so far has been linked to nine deaths.

The number of Americans sickened by a severe vaping-related illness continues to increase, according to a U.S. health official speaking at a Congressional hearing.

A bipartisan group of U.S. senators urged federal regulators to immediately remove all pod and cartridge-based e-cigarettes from the market until the products can be proven to be safe.

U.S. health officials said there are 530 confirmed and probable cases and seven deaths from severe lung-related illnesses tied to vaping, and there are no signs that the outbreak is easing.

An independent expert panel to the U.S. FDA recommended approval of GlaxoSmithKline Plc’s over-the-counter nicotine oral spray that aims to help smokers quit their addiction.

Congressional Democrats threatened to subpoena Juul Labs if the e-cigarette maker does not provide documents relating to the company’s products and marketing practices, as a House panel looks into whether Juul deliberately targeted children.

New York Governor Andrew Cuomo announced a ban on all flavored e-cigarettes besides tobacco and menthol in response to a recent nationwide spate of sometimes deadly lung illnesses that U.S. health officials have linked to vaping.

New Jersey could become the latest state to restrict e-cigarette use, with the governor launching a task force to find ways to curb vaping, linked by U.S. health officials to hundreds of respiratory illnesses and a half-dozen deaths.

The Trump administration announced plans to remove all flavored e-cigarettes from store shelves in a widening crackdown on vaping, as officials warned that sweet flavors had drawn millions of children into nicotine addiction.

Health investigators are casting a wide net to understand what is sickening hundreds of vapers across the United States and still have not ruled out any product on the market.