These findings suggest that vaping can cause significant changes to the inner lining of blood vessels, said study lead author Alessandra Caporale, a post-doctoral researcher at University of Pennsylvania.
Companies such as Juul Labs Inc. lose home turf as the San Francisco Board of Supervisors approved the ordinance on Tuesday, banning the sale and distribution of e-cigarettes until they have approval from the US Food and Drug Administration.
A July 2017 report from the Federal Emergency Management Agency said that from January 2009 through December 2016, there were 195 reports of explosions involving e-cigarettes, 38 of which caused severe injuries.
Vaping laws vary from country to country. While laws of some countries consider e-cigarettes strictly illegal, others permit its use under strict restrictions. Prohibition is most common in Asia, the Middle East, and South America.
E-cigarettes are nicotine-emitting devices that have grown into a multibillion-dollar industry in the U.S. despite little research on their long-term health effects, including whether they are useful in helping smokers quit cigarettes.