Shares of Moderna (NASDAQ: MRNA) were rising 3.1% as of 12:51 p.m. ET. The gain came after results were announced for a COVID-19 vaccine study led by the University of Oxford. This study found that a second dose of Moderna's vaccine following a first dose of either the Pfizer-BioNTech vaccine or the AstraZeneca vaccine was more effective than two doses of the two other vaccines.
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