Search results
Results From The WOW.Com Content Network
Influenza, commonly known as the flu, is an infectious disease caused by influenza viruses.Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue.
Influenza A viruses are further classified, based on the viral surface proteins hemagglutinin (HA or H) and neuraminidase (NA or N). 18 HA subtypes (or serotypes) and 11 NA subtypes of influenza A virus have been isolated in nature. Among these, the HA subtype 1-16 and NA subtype 1-9 are found in wild waterfowl and shorebirds and the HA ...
Influenza A virus (Alphainfluenzavirus influenzae) [1] or IAV is the only species of the genus Alphainfluenzavirus of the virus family Orthomyxoviridae. [2] It is a pathogen with strains that infect birds and some mammals, as well as causing seasonal flu in humans. [3]
There are four different types of influenza virus: A, B, C, and D. Influenza C usually causes only mild illness while D mostly affects animals, especially cattle.
Influenza viruses are members of the family Orthomyxoviridae. [2] Influenza viruses A, B, C, and D represent the four antigenic types of influenza viruses. [3] Of the four antigenic types, influenza A virus is the most severe, influenza B virus is less severe but can still cause outbreaks, and influenza C virus is usually only associated with minor symptoms.
Variants of Influenza A virus are identified and named according to the isolate that they are like and thus are presumed to share lineage (example Fujian flu virus like); according to their typical host (example Human flu virus); according to their subtype (example H3N2); and according to their deadliness (e.g., Low Pathogenic as discussed below).
The virus is highly contagious and can cause severe diarrhea and vomiting. To limit your risk of respiratory illness, vaccinations for both COVID-19 and influenza are recommended. Frequent ...
Influenza B virus is the only species in the genus Betainfluenzavirus in the virus family Orthomyxoviridae.. Influenza B virus is a negative-sense single-strand RNA virus known only to infect certain mammal species, including humans, ferrets, pigs, and seals.