What harmful substances are in illegal vapes?

Edenderry Garda station remains closed for specialist deep cleaning after two gardaí became seriously unwell while processing seized vapes at the County Offaly station on Wednesday, and were taken to hospital.Garda sources said the two members of the force who were handling the items became “very ill” after being overpowered as they processed and bagged items from the haul. Cannabis vapes emit fumes, and also include lithium batteries.But, what harmful compounds are in these illegal vapes?Joining Shane to discuss is John Crown, Consultant Oncologist at St Vincent's Hospital.