Secondhand smoke and secondhand aerosol Secondhand smoke is harmful to those around you, putting them at risk for serious health issues. Protect your loved ones from the dangers of secondhand smoke by getting started with 802 Quits Asthma and Allergy Foundation Tobacco can be bad for your health even if you are not the one smoking. Breathing in the smoke can lead to many health problems. Vaping is E Cigarettes (Vapes) Smoking and Tobacco Use CDC Secondhand smoke and secondhand aerosol