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Summary
Reports of lung injuries from e-cigarettes splash across the news these days, but the nicotine-delivery devices are also spawning a quieter worry: whether users risk long-term health effects that may not manifest for decades. Studies in animals and people are now starting to probe whether e-cigarettes pose chronic risks to the lungs and cardiovascular system and how the chemicals they contain might disrupt healthy biology. This month, the National Heart, Lung, and Blood Institute gave a boost to studies of acute and chronic effects when it announced supplemental funds for ongoing e-cigarette research, on which the institute spend $23 million this year. Animal studies are yielding clues about what long-term effects to look for in people, and human studies are gearing up.
