Dr. Donovan on Why Vaccines Shouldn’t be Spaced Out Channel: Georgetown University379 views • 15/06/2015Related VideosDr. Donovan's Advice for Childhood VaccinationsDr. Donovan on Safety Data for VaccinesDr. Donovan on Why all Children Should be Vaccinated.Childhood Vaccines - Should They Be Spaced Out Over Time? Vaccine Expert Weighs In!