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Extension of Flu Health Officer Order

Published: April 30, 2019

 To: Health Care Providers, Healthcare Facility Leadership
 From: Celeste Philip, MD, MPH, Health Officer
 Questions: Disease Control Unit - Public Health (707) 565-4566
 CC: Please Share with all Medical Staff

Although influenza activity is decreasing across the nation, in certain areas, including Sonoma County, activity remains widespread and significantly elevated above baseline. The current dominant type and subtype is influenza A H3N2. Influenza activity may continue through the spring and clinicians should continue to consider influenza in their differential diagnoses, rapidly treat high-risk patients suspected to have flu with antivirals and adhere to appropriate infection control precautions. Flu vaccination is still the best way to prevent illness and flu-related hospitalizations.   

To continue to protect health care workers (HCWs) and patients from influenza disease, hospitalization and death, the current Health Officer order requiring influenza vaccination of certain HCWs, or if they decline, to wear a mask while working in patient care areas of certain health care facilities will be extended from April 30 to May 15, 2019.

As outlined in the Health Officer order influenza surveillance data may inform modifications of the period during which the masking requirement will apply. Ongoing review of regional influenza activity will inform future decisions to further extend the Health Officer order.  

To view the original Health Officer order issued on October 4, 2018 and the go here: and scroll to the “For Health Providers” section.  

View the October 18, 2018, Influenza Health Advisory.