Health Effects of Maternal Exposure to Thirdhand Chemical Residue from Vape Aerosols Persist Long After Infancy Thirdhand Smoke Resource Center Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Second hand smoke is highly toxic. Here's what happens when pregnant women and their babies are exposed to second hand smoke. A smoke free and vape free environment during and after pregnancy is essential for your baby's safety. Learn more at SNHD.INFO SUID. Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Vaping Side Effects. Protecting Children's Health