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Respiratory virus activity

UCLA dataLast updated October 8, 2026

Line chart of weekly test positivity at UCLA for influenza A, influenza B, RSV and COVID-19

UCLA Respiratory Virus Trend Weekly test positivity for Flu A, Flu B, RSV and COVID-19. Open full size (opens in new tab)

Hospital · UCLA UCLA Respiratory Virus Trend
County · LADPH · Weekly LA County Respiratory Watch Local influenza, RSV and COVID-19 activity from the LA County Department of Public Health. (opens in new tab)
National · CDC · Weekly Current Respiratory Virus Positivity Rates National and state trends for influenza, RSV and COVID-19. CDC updates them weekly. (opens in new tab)

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Related resources

More from the UCLA Clinical Microbiology Laboratory.

Institutional · 2025 isolates UCLA Health Antibiogram 2026 PDF Institutional susceptibility data for organisms isolated in 2025. (opens in new tab) Regional LA County Antibiogram EXTERNAL Regional susceptibility data from the LA County Department of Public Health. It's useful context but doesn't replace UCLA's own data. (opens in new tab) Before you order UCLA Laboratory Test Directory Search laboratory tests and read test-specific information before you order or collect specimens. (opens in new tab) Department UCLA Clinical Microbiology Laboratory Department page covering organism detection, identification and susceptibility testing. (opens in new tab)