'The vaccines are working': Amid caution and concern, experts celebrate vaccine efficacy

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Mar 09, 2021 'The vaccines are working': Amid caution and concern, experts celebrate vaccine efficacy Several new coronavirus variants have been identified in the U.S. in recent weeks, but experts stress that the Covid-19 vaccines are performing well. As the country is still contending with stubbornly high case rates, rather than fret over new strains, people should get vaccinated and redouble mitigation efforts. "The thing people should take away from the variant story is just: Don't let your guard down," one expert said.  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