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Data are updated daily in the early afternoon and reflect laboratory results reported to the Washington State Department of Health as of midnight the day before. Data for previous dates will be updated as new results are entered, interviews are conducted, and data errors are corrected.

Rates reflect the populations tested and may not be representative of illness trends in the general population. Rate of positive test results across various demographic groups will change as more people are tested within each group.

Many people test positive but do not require hospitalization. The counts of positive cases do not necessarily indicate levels of demand at local hospitals.

Reporting of test results to the Washington State Department of Health may be delayed by several days and will be updated when data are available. Only positive or negative test results are reflected in the counts and exclude tests where results are pending, inconclusive or were not performed.

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