Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 58 · Episode 4 ·
The Vaccine
With unique access to five vaccine teams around the globe, this is the extraordinary inside story of the unprecedented quest to develop and make vaccines to fight Covid-19.
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Episode 4 of season 58 of Horizon: “The Vaccine”. Aired 2021-07-08. Watch it online free on ZapFlix.