The University of Arizona is considering reinstating a ban on e-cigarettes. The move comes after months of study.

Allison Vaillancourt, UA Human Resources Chief, said the possible policy change was prompted by research showing electronic nicotine delivery is more harmful than once believed. The school initially banned e-cigarettes, along with tobacco products in 2014, Vaillancourt said, but the e-cig rule changed after input from students, employees and visitors. 

She said the school then put together a 10-person team to study the issue. The team included several UA medical professors. They found that most chemicals in e-cigarettes have not been tested for lung toxicity and the vapors could be harmful to others. The school is taking community feedback on the proposal through Oct. 3. 

The Associated Press Contributed to this report.