Fig. 5: Community wastewater enables early Omicron detection and reveals lineage dynamics.
From: Wastewater sequencing reveals early cryptic SARS-CoV-2 variant transmission
a, Prevalence of SARS-CoV-2 VOCs in wastewater collected from the Point Loma wastewater treatment plant from late September 2021 to early February 2022. b, Estimated VOC concentrations; prevalence estimates were scaled by normalized viral load in wastewater. c,d, Lineage-specific estimates of prevalence (c) and concentration (d). All curves show an adaptive rolling average calculated using a local linear approximation (Savitzky–Golay filter) of virus copies per litre, with a window size of ±1 sampling date.
