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Fig. 1 | BMC Public Health

Fig. 1

From: Using genomic epidemiology of SARS-CoV-2 to support contact tracing and public health surveillance in rural Humboldt County, California

Fig. 1

Overview and evolution of testing and sequencing for SARS-CoV-2 in Humboldt County. The blue bar chart indicates the number of tests performed in Humboldt County by the HCPHL by day since the start of testing through to the time of writing on March 13, 2021. The maroon bar chart indicates the number of qPCR-positive SARS-CoV-2 cases detected in Humboldt County over the same time period. The orange bar chart indicates the number of viral consensus genome sequences generated from diagnostic specimens up until the end of January 2021. Major changes to SARS-CoV-2 testing infrastructure are indicated with numbered droplet icons. These correspond to the following changes in SARS-CoV-2 testing infrastructure over time: 1: Switched from manual RNA extractions to automated extractions with Qiagen EZ1. 2: Validated the GeneXpert Xpress SARS-CoV-2 testing assay. 3: Switched from singleplex to TaqPath multiplex SARS-CoV-2 assay. 4: Switched to CDC SARS-CoV-2 multiplex assay using the KingFisher Flex. 5: Switched to multi-pathogen testing using GeneXpert Xpress SARS-CoV-2/Influenza/RSV 4-plex assay. Shipments for viral genome sequencing are indicated with the CZ Biohub logo

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