Smoking is highly addictive with 1 in 4 adults in the UK smokers. Some may find these images disturbing.
The number of women smoking during pregnancy has been falling, but still stands at 17%.
Lung disease is the most common form of death for smokers, contributing to the 106,000 UK deaths a year from smoking.
Research has shown second-hand smoke, a combination of smoke from the burning tip and that exhaled by the smoker, can cause death. Children are particularly susceptible.
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Quiz: St George's day