NOVA

Immunity and Vaccines Explained

Clip: Season 41 Episode 14 | 2m 11s

Vaccines work with our immune system to keep us from getting sick.

Aired: 09/04/14

Rating: TV-PG

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National corporate funding for NOVA is provided by <a href="http://www.draper.com/" target=_blank">Draper</a>. Major funding for NOVA is provided by the David H. Koch Fund for Science, the <a href="http://www.cpb.org/" target="_blank">Corporation for ...