The concentration of SARS-CoV-2 in wastewater is in blue, and publicly reported cases in red. The red curve might lead you to conclude cases are much lower than in January, but the wastewater values are as high or higher than back then!Testing practices changed drastically during this time period, but people still go to the bathroom. Plotting positivity also supports the conclusion that wastewater is giving the more consistent picture of disease levels - there is a close match between ww and positivity.
Also recall that it was February 2022 when San Francisco dropped all mitigation measures including mask mandates -- towards the top of the downward slope on that previous surge.
