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Pfizer says trial showed its COVID-19 vaccine was 100 percent effective in adolescents
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How will America's accelerating COVID-19 vaccination drive affect the looming 4th wave of infections?
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Iowa teenager invents color-changing sutures that could curb infection rates
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WHO chief surprisingly says coronavirus origin question warrants further investigation
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Canada halts AstraZeneca COVID-19 vaccine for people 55 and under, citing 'uncertainty' on blood clots
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Moderna and Pfizer vaccines 'highly effective' at preventing infections in CDC study
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WHO-China draft report on COVID-19 origins says Wuhan lab leak 'extremely unlikely'
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Trial to study delivering AstraZeneca COVID-19 vaccine as a nasal spray
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Once nearly extinct, American bald eagle population has quadrupled since 2009
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A pro-Trump evangelical advised getting the COVID-19 vaccine. His fans revolted.
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AstraZeneca says revised data shows COVID-19 vaccine 76 percent effective
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Indonesian man spends 24 years transforming fire-ravaged land into lush ecosystem
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Zuckerberg calls for Section 230 reforms — but they may help Facebook
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COVID-19 vaccines appear to cause sharp drop in infections in groups of American, Israeli health-care workers
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