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This happens if the infection is not treated or if the treatment is not effective and the virus remains in the body for longer than 6 months.[6] Children are typically vaccinated for HBV at age 11-15

The study aimed to determine whether babies born to adolescents who used either or both e-cigarettes and vapes were more likely to be SGA as compared to babies of non-smoking, non-vaping teenage mothers

According to a survey by the Centers for Disease Control and Prevention, while the percentage of high school students smoking cigarettes has decreased from 15.7% to 9.2% from 2013 to 2014, the percentage of high school students using vaporizers tripled in the same time period

Race, Educational Attainment, and E-Cigarette Use