respiratory viruses

Respiratory Viruses Healthcare Professionals Hub

Current Situation

Clinician Alert:

CDPH Recommends Immunizing Infants with RSV Monoclonal Antibodies through April 2026, Given Ongoing RSV Disease Activity - 3/10/2026

Respiratory Viruses in California

CDPH tracks and monitors respiratory virus disease trends through various methods. CDPH analyzes the number of positive tests from those who seek healthcare and are tested to identify changes in disease patterns. CDPH monitors hospitalization rates for COVID-19, influenza, and RSV throughout California and compiles death data from these diseases by looking at vital records.

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In California, the amount of combined respiratory illness (Influenza (flu), RSV, and COVID-19) causing people to seek health care is low.

Respiratory Viruses Information for Healthcare Professionals

Many respiratory viruses, including COVID-19, circulate year-round in the United States and California. Some viruses are more active from October through March, such as influenza (flu), respiratory syncytial virus (RSV), and many others.

While seasons fluctuate, flu, RSV, and COVID-19 cause hundreds of thousands of hospital admissions and tens of thousands of deaths each year in the United States.

Stay up to date about what’s circulating in the community and talk to your patients about core strategies for prevention of respiratory virus infections.