Overview

This dashboard shows the overall daily testing volumes for COVID-19 performed at UW Virology in UW Medicine’s Department of Laboratory Medicine. Greater than 95% of the testing volume reported in this dashboard is performed for individuals whose samples were collected in the state of Washington. We receive test orders from a variety of settings and locations including inpatients, outpatients, employee health, and community health screening settings. This dashboard excludes testing performed for individuals whose samples we have received for research studies.

Inconclusive and positive results are added together to compute the positivity rate.

Data Last Updated: 2025-04-23

Daily Statistics

Daily Breakdown of Resulted Tests

Overview

A subset of positive samples collected from all SARS-CoV-2 PCR collection locations served by UW Virology is directed to viral genomic sequencing to identify SARS-CoV-2 variants. This data represents most of the samples sequenced for surveillance purposes since December 2020. Information about the variants of concern is available on the CDC website.

Monthly Proportions of Variants of Concern

Details on Variants of Concern and Interest

WHO variant summary

Lineage info:

• Omicron (B.1.1.529): Variant of concern with a large number of spike protein mutations originally detected in South Africa
• Delta (B.1.617.2, AY.1, AY.2, AY.3): Variant of concern originally identified in India with several spike mutations
• Alpha (B.1.1.7): Variant of concern originally identified in UK, associated with the N501Y mutation
• Gamma (P.1): Variant of concern, alias of B.1.1.28.1, lineage originally identified in Brazil with a number of spike mutaions with likely functional significance E484K, K417T, and N501Y
• Beta (B.1.351): Variant of concern originally detected in South Africa
• Iota (B.1.526): Variant of interest originally identified circulating in New York but with a few exports to other countries
• Kappa (B.1.617.1): Variant of interest originally identified in India
• Lambda (C.37): Variant of interest, lineage originally identified in Peru
• Eta (B.1.525): Variant of interest, international lineage with E484K, del69-70 among other defining mutations
• Mu (B.1.621): Variant of interest, lineage originally identified in Colombia
• Epsilon (B.1.429/B.1.427): Originally circulating in California but with exports to other countries. No longer considered a VOI by WHO.
• Zeta (P.2): Alias of B.1.1.28.2, lineage originally identified in Brazil, no longer a VOI by WHO
• Theta (P.3): Alias of B.1.1.28.3, lineage originally identified in the Philippines with spike mutations E484K, N501Y, P681H, 141-143del, no longer a VOI by WHO