BREAKING: Novavax says its Covid vaccine is highly effective in U.S. trials, including against variants

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Jun 14, 2021 BREAKING: Novavax says its Covid vaccine is highly effective in U.S. trials, including against variants Biotech company Novavax reported Monday that Phase 3 trials showed its Covid-19 vaccine to be safe and 100 percent effective in preventing moderate to severe disease. The company's vaccine works differently than the others already authorized for use in the U.S. Read More Get the NBC News Mobile App Follow NBC News Check out all of NBCNEWS Newsletters here. Update Preferences | Unsubscribe | Contact | Privacy Update Preferences Unsubscribe Contact Privacy