More Transmissible BA.2 Omicron Variant Achieves Global Domination: Now Accounts For About 75% Of Cases Sequenced Worldwide, Per WHO
may provide better insight. It found about 33% of U.S. sites monitored showed a rise in Covid levels from March 1-10. That’s double what it was during the same period in February.
Wastewater is often the earliest — and most accurate — indicator of a coming surge because it does not rely on people deciding to take tests, and it covers the entire population serviced by each sewage system. Rising case numbers usually follow rising wastewater data after a few weeks. “While wastewater levels are generally very low across the board, we are seeing an uptick of sites reporting an increase,” Amy Kirby, who heads the CDC’s wastewater monitoring program,in a statement. “These bumps may simply reflect minor increase from very low levels to still low levels.”
But wastewater by no means provides a complete dataset. Many parts of the country do not analyze wastewater for Covid-19. That could be part of a larger problem if, indeed, there is a coming wave Stateside. “We need a very strong surveillance system around the world for Covid-19,” said Dr. Van Kerkhove this week. “Despite all of the challenges we are facing, we still need to maintain testing. We still need to maintain robust sequencing and making sure that we have good geographic representation of the sequences that are shared so that we can really track this virus in real time.”
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