The percentage of American children ages 4-11 with any detectable cotinine (a product of nicotine breakdown) in their system decreased from 87.7% of children from 1988-1994 to 52.6% of children from 2007-2008. The percentage of children with serious secondhand smoke hasn't changed significantly since 1999-2000.
The percentage of American children ages 4-11 with any detectable cotinine (a product of nicotine breakdown) in their system decreased from 87.7% of children from 1988-1994 to 52.6% of children from 2007-2008. The percentage of children with serious secondhand smoke hasn't changed significantly since 1999-2000.