Dr. Rochelle Walensky, the director of the Centers for Disease Control and Prevention, said on Monday that the ability of the United States to detect new, more contagious coronavirus variants had increased tenfold, even as those efforts remain well behind levels experts have said are needed.
At a White House Covid-19 briefing, she said labs were aiming to sequence 7,000 samples of the virus per week, a significant increase from the week of Jan. 10, when she said that only 251 samples had been sequenced. Last week, 2,238 samples were sequenced for the virus mutations, she said.
The C.D.C.’s system for sequencing the virus to detect mutations — nicknamed “NS3” — was still being scaled up with large commercial lab partners, who were analyzing 3,000…
— to www.nytimes.com