Johnson & Johnson's single-dose vaccine offers strong protection against severe COVID-19, according to an analysis by U.S. regulators Wednesday that sets the stage for a final decision on a new and easier-to-use shot to help tame the pandemic.
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Virus update: A mass test of Pfizer’s COVID-19 vaccine in more than half a million people confirms that it’s very effective at preventing serious illness or death, even after one dose. Here's the latest.
U.S. health advisers endorsed a one-dose COVID-19 vaccine from Johnson & Johnson on Friday. Formal authorization is expected soon, with distribution coming within days.