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Omicron has sparked alarm among epidemiologists worried the new covid-19 variant's mutations could make it more transmissible. Scientists across the globe are racing to learn more as new cases are confirmed.
The delta variant, first detected in India, appears to be the most "fit" variant, which means it will probably outcompete other variants to infect more people.
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White House officials, vaccine manufacturers say they are sprinting to stave off omicron.
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Monitoring the Pandemic
A series of graphics tracking U.S. covid-19 cases, deaths and vaccination rates
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The geography of covid-19 vaccinations and hospitalizations across the United States reveal a stark divide: areas with low rates of vaccination have higher rates of admitted patients.
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