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Shot Hailed as Super Effective; J&J Gets Big Win: Virus Update Bloomberg 2/24/2021 Bloomberg News © Bloomberg A healthcare worker administers a dose of the AstraZeneca Covid-19 vaccine at a vaccination center at La Rural convention center in Buenos Aires, Argentina, on Monday, Feb. 22, 2021. Argentine President Alberto Fernandez fired his health minister in an attempt to defuse a scandal over government allies having received preferential access to Covid-19 vaccinations. (Bloomberg) The shot made by Pfizer Inc. and BioNTech SE was overwhelmingly effective against the virus in a study, prompting experts to say that immunizations can end the pandemic. Johnson & Johnson’s Covid-19 vaccine is safe and effective, U.S. regulators said, a milestone toward giving Americans the first shot to work in a single dose.

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