E cigarettes become more common, but there is uncertainty about long term health effects RiverBender.com Brochure: Screening for Tobacco and E Cigarette Use Among Adolescents Central District Health Army issues public health alert on vaping dangers > Joint Base San Antonio > News Vaping is often marketed as a safer alternative to smoking, but many vape products contain nicotine, harmful chemicals, and heavy metals that can harm developing brains and lungs.