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(Phill Magakoe/AFP/Getty Images)
The two Ontario cases mark the first confirmation of omicron, named a "variant of concern," reaching North America.
That campaign is likely to involve messages urging people to get boosters and efforts to make sure the shots are available in as many locations as possible.
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Omicron has sparked alarm among epidemiologists worried the new variant's mutations could make it more transmissible. Scientists across the globe are racing to learn more as new cases are confirmed.
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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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