Researchers found evidence that e-cigarette vapor increases a receptor that pneumococci use to adhere to cells that line the airways.

Although the study enrolled only a small number of participants, Jonathan Grigg, MD, MBBS, MRCP, FRCPCH, professor of pediatric respiratory and environmental medicine [...] said their findings suggest that people who are exposed to e-cigarette vapors are more susceptible to pneumococcal infection. [...]