In light of the booming popularity of e-cigarettes and the rising number of deaths from vaping, a team of researchers from the University of Louisiana at Lafayette set out to determine whether e-cigarettes might boost the risk of pneumonia. "S. pneumonia is the most frequent cause of pneumonia in children five years and under, as well as adults older than 65, and immune-compromised individuals," according to the report. Exposure to smoke from conventional cigarettes is a critical risk factor for pneumonia.