Pfizer and BioNTech apply for clearance of their coronavirus vaccine amid historic scientific gains and horrific pandemic spread

Pfizer filed for emergency authorization for its coronavirus vaccine Friday, capping a two-week period marked by blockbuster scientific advances against the pandemic but also its ghastly toll: an additional 1.5 millon people diagnosed with covid-19, the disease caused by the virus, and 13,000 deaths.

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Contributor: Laurie McGinley