# Romina Libster: The power of herd immunity

How do vaccines prevent disease — even among people too young to get vaccinated? It's a concept called "herd immunity," and it relies on a critical mass of people getting their shots to break the chain of infection. Health researcher Romina Libster shows how herd immunity contained a deadly outbreak of H1N1 in her hometown. (In Spanish with subtitles.)

- Kind: Talk
- Year: 2015
- Runtime: 14 min
- By: TED.com
- Genres: Education
- Archive: [Internet Archive](https://archive.org/details/RominaLibster_2014X)
- Licence or status: [CC BY-NC-ND 3.0](http://creativecommons.org/licenses/by-nc-nd/3.0/) (as the archive states it)
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/RominaLibster_2014X?play=1)