Key events in development of Pfizer's COVID-19 vaccine
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November 8, 2020
Key events in the development of a COVID-19 vaccine by partners Pfizer Inc. and Germany's BioNTech:
March 17 — Pfizer and BioNTech announce plans to jointly develop a COVID-19 vaccine using BioNTech's technology.
April 29 — Testing of four vaccine candidates begins with volunteers in Germany, one of six countries in the testing plan.
May 5 — Testing expands to the United States.
July 1 — Preliminary data shows one of four candidates appears to stimulate the immune system, is well tolerated.
July 22 — U.S. government agrees to buy 100 million vaccine doses for $1.95 billion, with an option for...
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