Vaping May Be More Dangerous Than Cigarette Smoking, Studies Show University Hospitals E cigarette flavors are toxic to white blood cells, warn scientists About 28% of teens who vape say they use e cigarette products every day. Some teens think e cigs or nicotine pouches are a safer alternative, but they're just as addictive and can contain E cigarette or Vaping Use Associated Lung Injury (EVALI) American Lung Association