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