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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 ...
Despite the high morbidity and mortality rates that resulted from the epidemic, the Spanish flu began to fade from public awareness over the decades until the arrival of news about bird flu and other pandemics in the 1990s and 2000s. [320] [321] This has led some historians to label the Spanish flu a "forgotten pandemic". [177]
1889-1890 Russian flu; 1918 Spanish flu ... 2009 swine flu; Outbreaks. 1976 swine flu; ... Its name derives from the forms of the two kinds of proteins on the surface ...
To help reduce your chances of getting the flu, regularly disinfect your hands, avoid touching your face while shopping, and use sanitizing wipes on cart handles. 5. Retail Stores and Shopping Malls
Influenza A virus subtype H7N7 (A/H7N7) is a subtype of Influenza A virus, a genus of Orthomyxovirus, the viruses responsible for influenza.Highly pathogenic strains (HPAI) and low pathogenic strains (LPAI) exist.
Be aware of snakes on trails, roads and concrete surfaces that keep them warm. If a snake gets into a building, stay calm and try to use a broom or other long pole to herd it outside. To avoid ...
The influenza viruses are members of the family Orthomyxoviridae. [1] Influenza viruses A, B, C, and D represent the four antigenic types of influenza viruses. [4] 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. [5]
Finding just a snake skin, a really big snake skin. When the temperatures begin to drop, snakes go into a state called brumation . This event acts as a type of hibernation for cold-blooded animals.