The Washington State Department of Health reports their Influenza Update for week 12 shows that laboratory-confirmed flu activity as reported by clinical laboratories continues to decrease; however, influenza-like illness activity is increasing. Influenza severity indicators remain moderate to low overall, but hospitalization rates differ by age group. The state reports that these trends may reflect overlapping influenza and COVID-19 epidemics and/or surveillance artifact associated with changes in health-care seeking behaviors and limited availability of testing supplies.

State Summary: Flu activity is elevated but decreasing

Eighty-nine lab-confirmed influenza deaths have been reported for the 2019-2020 season to date.
Seventy-one influenza-like illness outbreaks in long term care facilities have been reported for the 2019-2020 season to date.
During week 12, 6.1 percent of visits among Influenza-like illness Network participants were for influenza-like illness, above the baseline of 1.5 percent.
During week 12, 3 percent of specimens tested by WHO/NREVSS collaborating laboratories in Washington were positive for influenza.
Influenza A and Influenza B were reported during week 12.

Historic influenza reports and DOH influenza information for healthcare providers and public health: Historic influenza reports from past seasons are available here.
Influenza information for healthcare providers and public health professionals is available here.