Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Vaping more effective than patches for pregnant women, study finds Dr Colin Mendelsohn We've updated our vaping during pregnancy resource. Created in partnership with ASH, the Royal College of Midwives and Sands, the infographic has important guidance around vapes and pregnancy. The resource is now Secondhand smoke and secondhand aerosol Secondhand smoke and secondhand aerosol