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J&J 1-dose shot prevents COVID-19, but less than some others

Johnson & Johnson’s long-awaited vaccine appears to protect against COVID-19 with just one shot—not as strong as some two-shot rivals but still potentially helpful for a world in dire need of more doses.

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J&J 1-dose shot prevents COVID-19, but less than some others

Johnson & Johnson’s long-awaited vaccine appears to protect against COVID-19 with just one shot—not as strong as some two-shot rivals but still potentially helpful for a world in dire need of more doses.
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