In the UK, children breathing in other people’s cigarette smoke results in 300,000 GP visits and 9,500 hospital admissions for children every year.
Source: Secondhand smoke @ NHS Smokefree
Image by Challiyil Eswaramangalath Vipin from Chalakudy, India (cigarette.. like a cigarette in the rain) [CC-BY-SA-2.0], via Wikimedia Commons