
Stream TypeLIVE
- Chapters
Current Time 0:00
LIVE
Loaded: 0%
0:00
Progress: 0%
Seekbar Handle
/
Duration Time 0:00
Remaining Time -0:00
- Descriptions Off
- Subtitles Off
- Settings, opens captions settings dialog
- Captions Off
- English
- Español
- More Options
- Quality
- Audio Tracks
- Download
This is a modal window.
Captions Settings Dialog
Beginning of dialog window. Escape will cancel and close the window.
Why Doesn't the Flu Vaccine Always Work?
Every year, we're reminded to get the flu vaccine. Many of us do. But each flu season, some vaccinated people still get the flu. Why? Shouldn't the vaccine protect us? Let's take a moment to learn why the flu vaccine doesn't always work.