TOPEKA, Kan. (AP) — Kansas schools are struggling to prevent vaping among students, even as growing cases appear nationwide of a mysterious lung disease related to the use of electronic cigarettes.

E-cigarettes have been described as a less dangerous alternative to regular cigarettes, but health officials say their high nicotine content can harm developing brains and encourage cigarette use. Mark Thompson, a consultant focused on health and physical education at the Kansas State Department of Education, said schools began to see the impact of vaping among students last academic year.

"Vaping h...