U.S. health officials say that while the omicron variant of the coronavirus is rapidly spreading in the country, early indications suggest it may be less dangerous than delta, which continues to drive a surge of hospitalizations.

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President Joe Biden’s chief medical adviser, Dr. Anthony Fauci, told CNN’s “State of the Union” scientists need more information before drawing conclusions about omicron’s severity.

But reports from South Africa, where it emerged and is becoming the dominant strain, suggest hospitalization rates have not increased alarmingly.

Omicron had been detected in about a third of U.S. states by Sunday.

Fauci said the Biden administration is considering lifting travel restrictions against noncitizens entering the United States from several African countries.

Answers to 25 common COVID-19 vaccine questions

Vaccinations for COVID-19 began being administered in the U.S. on Dec. 14, 2020. The quick rollout came a little more than a year after the virus was first identified in November 2019. The impressive speed with which vaccines were developed has also left a lot of people with a lot of questions. The questions range from the practical—how will I get vaccinated?—to the scientific—how do these vaccines even work?

Keep reading to discover answers to 25 common COVID-19 vaccine questions.

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