“The negative impact that exposure to second-hand tobacco smoke can have on children’s health has been extensively studied but the impact of second-hand marijuana smoke on young children is unclear,” Dr.
It found that parents who regularly smoke pot reported their children experienced more viral respiratory infections in the year prior to the survey compared with kids of parents who smoked neither tobacco nor marijuana.
Johnson, an assistant professor of emergency medicine at Wake Forest School of Medicine in Winston-Salem, N.C., and his co-authors caution that the study only shows a link between second-hand cannabis smoke and the frequency of respiratory infections in children.