More than a third of the CDC’s wastewater sample sites across the U.S. showed rising Covid-19 trends in the period ending March 1 to March 10, though reported cases have stayed near a recent low.
The number of sites with rising signals of Covid-19 cases is nearly twice what it was during the Feb. 1 to Feb. 10 period, when the wave of omicron-variant cases was fading rapidly.
Is it a wave or just a bump?
