(CNN) With the Delta and Omicron coronavirus variants spreading across the nation as the new year approaches, health experts are urging Americans to get vaccinated or boosted to protect themselves and others before they face greater chances of infection.
According to scientists' most pessimistic projections, the U.S. could reach over a half-million average daily infections by the end of January — more than double last winter's peak.
The CDC announced Thursday the initiative began Wednesday in a move to encourage international travelers to test themselves once they enter the country since the U.S. does not require it.
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