ABC News’ Martha Raddatz interviews former director of the CDC National Center for Immunization and Respiratory Diseases Dr. Demetre Daskalakis on “This Week.” ––– Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. Download the ABC News app for the latest headlines and alerts: https://abcnews.go.com/devices Watch 24/7 coverage of breaking news and live