Healthcare ❯ Vaccination

Flu Vaccine

Efficacy Effectiveness Vaccine Effectiveness Eligibility Vaccine Efficacy Public Health Recommendations Pediatric Vaccination COVID-19 Vaccine Child Vaccination Types of Vaccines Child Vaccination Rates Immunization Rates Importance Public Awareness Trivalent Vaccine Distribution Vulnerable Populations Immunization Seasonal Vaccination High-Dose Vaccine Vaccine Safety Campaigns NHS Availability Public Health Campaigns Campaign Effectiveness Children's Health

Drifted H3N2 ‘Subclade K’ Spreads to U.S. as Early Flu Wave Builds

Preliminary data indicate reduced vaccine match with continued protection against severe illness.

Drifted H3N2 Variant Drives Early U.S. Flu Rise as Hospitalizations Increase

Mutated H3N2 Strain Spurs Early Flu Rise as UK Admissions Climb and California, Chicago Flag Increases

Drifted H3N2 ‘Subclade K’ Drives Early U.S. Flu Uptick Before Holidays

New H3N2 Variant Emerges as Canada’s Flu Season Starts and U.S. Activity Remains Low

New H3N2 ‘Subclade K’ Drives Early Flu Surges as U.S. Officials Urge Vaccination

CDC Tallies 109 Pediatric Flu-Linked Encephalopathy Cases and 280 Deaths in 2024–25