Kidswhosmokeliketothinkthattheyareimmortal②-oratleastthatiftheystopintime,theirlungswillheal.Butareportinlastweek'sJournaloftheNationalCancerInstitutesuggestsearlysmokingmaytrigger③changesinDNA④thatputyoungsmokersathigherriskforcancereveniftheylaterquit.Researchersstudyinglungcancerpatientsroundthatthosewiththeworstgenetic⑤damagewerenotthosewhosmokedlongestbutthosewhostartedyoungest.What'smore,theearliertheystarted,themorewerethedamage.
