Tue. Mar 5th, 2024

For the last several weeks there has been increasing respiratory virus activity in Orange County. Rates of COVID-19, Respiratory Syncytial Virus (RSV), and Influenza disease are all rising based on the percentage of positive test results reported to OCHCA. RSV activity has been increasing for the last 6 weeks, but more recently increases in influenza and COVID-19 activity have been detected. These patterns are in line with the regular seasonal epidemiology of these viruses.

Vaccines are now available for the prevention of disease caused by all three of these viruses. This season’s influenza and COVID-19 vaccines are recommended for all persons 6-month of age and older, while RSV vaccines or nirsevimab monoclonal antibody are recommended for select populations. Based on data reported to the California Immunization Registry (CAIR), ~740,000 influenza vaccines have been administered in Orange County through week 46, while only ~260,000 doses of the current season’s COVID-19 vaccines and ~ 52,000 doses of RSV vaccine have been administered.



  • Providers should continue to consider treatment for COVID-19 disease particularly those at risk for severe disease. The latest recommendations for hospitalized and non-hospitalized children and adults available with the NIH COVID-19 Treatment Guidelines.
  • Providers should consider influenza antiviral medications for both treatment and for chemoprophylaxis of influenza. Recommendation for use during the 2023-2024 season can be found at CDC’s Influenza Antiviral Medications: Summary for Clinicians.

By Editor

The New Santa Ana blog has been covering news, events and politics in Santa Ana since 2009.

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