Numerous studies have shown negative impact of deadly fumes, produced from cigarette on health. Hence, smoking is not only highly dangerous for people who smoke, but also for people who inhale it.

Recent study has shown that secondhand smoke leads to greater blood-vessel damage in toddlers and obese children as compared to other children.   

The recent study was based on the data collected from 52 toddlers (ages 2 to 5 years) and 107 adolescents (ages 9 to 18 years).

Data analysis indicated that there was a 30 percent reduction in circulating vascular endothelial progenitor cells, a cell type involved in repair and maintaining a healthy blood vessel network, in toddlers exposed to secondhand smoke.

The study also found a link between the amount of secondhand smoke exposure and a marker of vascular injury in toddlers.

However, in case of obese toddlers the link was two times greater. Similarly, in case of obese adolescents the evidence of vascular injury, exposed to secondhand smoke, was two times as compared to normal-weight adolescents.

Study also showed that toddlers were at four time higher risk of exposure to secondhand smoke as compared with adolescents.  

John Bauer, the study's co-lead investigator from Nationwide Children's Hospital & Research Institute at Ohio State University said, "We think that the two factors together -- smoke exposure plus obesity -- may interact to amplify the degree of inflammation or vascular cell damage that occurs."