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UCLA Health · Antimicrobial Stewardship

UCLA Clinical Microbiology

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Respiratory virus activity

UCLA data UCLA Respiratory Virus Trend Weekly test positivity for Flu A, Flu B, RSV and COVID-19. Last updated October 8, 2026

LADPH · Weekly LA County Respiratory Watch Local influenza, RSV and COVID-19 activity from the LA County Department of Public Health. CDC · Weekly Current Respiratory Virus Positivity Rates National and state trends for influenza, RSV and COVID-19. CDC updates them weekly.

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Related resources

More from the UCLA Clinical Microbiology Laboratory.

UCLA Health Antibiogram 2026 PDF Institutional susceptibility data for organisms isolated in 2025. 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. UCLA Laboratory Test Directory Search laboratory tests and read test-specific information before you order or collect specimens. UCLA Clinical Microbiology Laboratory Department page covering organism detection, identification and susceptibility testing.