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influenza Full Definition

influenza Full Definition

influenza Full Definition
Definition of
influenza
define influenza

influenza /ɪnflʊˈɛnzə/noun
: a highly contagious viral infection of the respiratory passages causing fever, severe aching, and catarrh, and often occurring in epidemics.
: commonly known as “the flu”, is an infectious disease caused by an influenza virus.
: an acute, highly contagious, respiratory disease caused by any of three orthomyxoviruses:

(1) or influenza A : moderate to severe influenza that in humans is marked especially by sudden onset, fever, sore throat, fatigue, muscle aches, inflammation of the respiratory mucous membranes, and cough, that has numerous variants caused by subtypes (such as H1N1, H2N2, or H3N2) of an orthomyxovirus (species Influenza A virus of the genus Influenzavirus A) infecting humans and various animals (such as birds or pigs), and that may occur in seasonal epidemics or sometimes pandemics following mutation in the causative virus
(2) or influenza B : influenza with less severe symptoms that is caused by an orthomyxovirus (species Influenza B virus of the genus Influenzavirus B) infecting only humans and especially children and that may occur in seasonal epidemics but not pandemics
(3) or influenza C : mild influenza that is often asymptomatic, is caused by an orthomyxovirus (species Influenza C virus of the genus Influenzavirus C) infecting only humans, and does not occur in epidemics or pandemics

: an acute viral infection in humans involving the respiratory tract. It is marked by inflammation of the NASAL MUCOSA; the PHARYNX; and conjunctiva, and by headache and severe, often generalized, myalgia.

Synonyms
Flu, Human | Grippe | Human Flu | Human Influenza | Human Influenzas | Influenza | Influenza in Human | Influenza in Humans | Influenzas | Influenzas, Human

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