with 24/7 roadside assistance. ♪ karma-karma-karma-karma-karma chameleon... ♪ now to the fight against the coronavirus, moderna now says its vaccine is safe and appears to be effective at preventing covid-19 in people between 12 and 17 years old. next, it goes to the fda to consider extending the vaccine's emergency use authorization to adolescents. dr. paul offitt joins us now, a member of the fda's vaccine advisory panel and also the director of the vaccine education center at the children's hospital in philadelphia. doctor, it's good to have you on with us, what does the fda need to see in this data to broaden the emergency use authorization to this group?