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Dr. Anthony Fauci, the head of the National Institute of Allergy and Infectious Diseases, called the emerging Delta variant a cause for great concern and said it is the “greatest threat in the U.S. to our attempt to eliminate COVID-19.”
The variant was first reported in India and is up to 80 percent more transmissible than earlier variants. The Wall Street Journal reported that the United Kingdom, which has a high vaccination rate, has seen five times the number of new cases in recent weeks. (More than four in five adults have received their first shot and over 60 percent are fully vaccinated, the National Health Service said.)