Influenza
Last content update: 2/27/25
Masks are required for patients, visitors, and staff in patient care areas of health care delivery facilities in Santa Clara County from November 1 through March 31.
The County’s Health Order Requiring Use of Face Masks in Patient Care Areas of Health Care Delivery Facilities During Designated Winter Respiratory Virus Period requires use of face masks in patient care areas of healthcare facilities from November 1 through March 31 of each year.
For more information, visit our Public Health Orders webpage.
Talk to your patients about flu vaccination now
Begin recommending flu vaccine now, and vaccinate throughout the flu season, providing extra outreach to those at highest risk of severe COVID-19 or severe influenza.
The COVID-19 pandemic means preventing influenza is more important than ever. Preventing influenza means fewer people will need to seek medical care and testing for possible COVID-19 or influenza. Increasing flu vaccination saves healthcare resources for COVID-19 and other conditions.
Guidance for management of influenza and other respiratory viruses
Refer to the Respiratory virus guidelines webpage for isolation recommendations for influenza and other respiratory viruses for different settings, providers, and populations.
Health alerts and clinical guidance
- Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices — United States, 2024–25 Influenza Season
- Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices — United States, 2023–24 Influenza Season
Data on flu in the County of Santa Clara
The County of Santa Clara Public Health Department monitors influenza activity throughout the year.