AstraZeneca says its Covid-19 vaccine is highly effective
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AstraZeneca says its Covid-19 vaccine is highly effective
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AstraZeneca updates vaccine efficacy to 76 percent
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AstraZeneca updates vaccine efficacy to 76 percent
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US data shows AstraZeneca's COVID-19 vaccine effective for all adults
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AstraZeneca's Covid-19 vaccine shows 76 per cent efficacy in updated US trial results
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AstraZeneca says reports its COVID-19 vaccine has low efficacy in elderly people are 'completely incorrect'
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U.S. trials of AstraZeneca COVID-19 vaccine prove its efficacy and safety, Dr. Fauci says
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