Canadian Researchers Urge Delaying Second Dose of Pfizer Vaccine Because First Is Highly Effective

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By Reuters Staff2 Min Read(Reuters) — The sec­ond dose of Pfiz­er Inc’s COVID-19 vac­cine could be delayed in order to cov­er all pri­or­i­ty groups as the first one is high­ly pro­tec­tive, two Cana­da-based researchers said in a let­ter pub­lished in the New Eng­land Jour­nal of Medicine.Slideshow ( 2 images )The vac­cine had an effi­ca­cy of 92.6% after the first dose, Danu­ta Skowron­s­ki and Gas­ton De Ser­res said, based on an analy­sis of the doc­u­ments sub­mit­ted by the drug­mak­er to the U.S. Food and Drug Admin­is­tra­tion (FDA).These find­ings were sim­i­lar to the first-dose effi­ca­cy of 92.1% report­ed for Mod­er­na Inc’s …

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