Australian schools are tackling vaping by installing detectors in bathrooms. But how do they work?

The sale of nicotine e-cigarettes is illegal in Australia without a prescription. (ABC News: Tim Swanston)

Fewer young people are taking up smoking, but the same cannot be said about vaping.

Although illegal, many children have become hooked on addictive nicotine vapes, which come in a range of fruity flavours, masking worrying health impacts.