PBS News Hour

Why the race for a COVID-19 vaccine is complicated

Pharmaceutical companies and governments around the world are chasing a coronavirus vaccine, fast tracking the usually years-long vaccine development procedure to a few months. ProPublica reporter Caroline Chen joins Hari Sreenivasan to discuss the ambitious timeline and the unpredictability of the clinical trials.

Why the race for a COVID-19 vaccine is complicated

5m 46s

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