Prognosis

Variants Threaten U.S. Progress Against Pandemic, Fauci Says

  • Health officials testify before House panel on vaccinations
  • How some variants interact with vaccines remains open question
WATCH: Dr. Anthony Fauci says we're still in the middle of a serious Covid-19 outbreak.Source: Bloomberg)
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Dangerous coronavirus variants continue to threaten progress the U.S. has made in reducing Covid-19 cases and immunizing the population, according to the nation’s top infectious disease doctor.

“While we are cautiously optimistic about the future, we know that many challenges remain,” Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, said in prepared remarks ahead of a congressional hearing on Wednesday.