The Irish Times:

E-cigarette vapour destroys protective cells which keep the lungs clear of harmful particles, according to a new study published by the British Medical Journal (BMJ).

According to the small, laboratory-based study, vapour from e-cigarettes impairs the activity of human lung cells called macrophages which are responsible for removing dust, bacteria and allergens.

Some of the damage mirrors that seen in regular smokers and people with chronic lung disease, according to the study which appeared in the BMJ specialist journal Thorax.