Secondhand smoking is environmental tobacco smoke that is inhaled involuntarily or passively by someone who is not smoking. Secondhand smoking has various health risks. It can cause ear infections, more frequent and severe asthma attacks, respiratory symptoms and infections, greater risk of Sudden Infant Death Syndrome and increase risk of cancer.
The researchers at the University of California tested 496 blood samples from young children. The study tested blood levels of cotinine, a chemical produced by the body after it is exposed to nicotine,
Results reveal a new aspect of second hand smoking. It says, “Children do not necessarily need to be around someone who is smoking in order to be exposed to secondhand smoke. They can be exposed if they spend time in a room where someone has recently been smoking”.