Influenza viruses
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THE RESPIRATORY VIRUSES: INFLUENZA, RSV, AND …
www.columbia.eduInfluenza viruses Influenza viruses cause acute, usually self-limited febrile illnesses most often in the winter months. They belong to the orthomyxoviridae family and are classified into 3 distinct types- influenza A, influenza B and influenza C. Influenza A and B cause human disease with significant morbidity and mortality. Influenza C
The national influenza immunisation programme 2021 to 2022
assets.publishing.service.gov.uk10. Influenza viruses change continuously and the World Health Organization (WHO) monitors the epidemiology of influenza viruses throughout the world, making recommendations about the strains to be included in vaccines, with recommendations now confirmed for 2021 to 20223. 11.
National Strategy for pandemic influenza
www.cdc.govThe animal population serves as a reservoir for new influenza viruses. Scientists believe that avian, or bird, viruses played a role in the last three pandemics. The current concern for a pandemic arises from an unprecedented outbreak of H5N1 influenza in birds that began in 1997 and has spread across bird populations in Asia, Europe, and Africa.