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Influenza C virus is the only species in the genus Gammainfluenzavirus, in the virus family Orthomyxoviridae, which like other influenza viruses, causes influenza. Influenza C viruses are known to infect humans and pigs. [1] Flu due to the Type C species is rare compared with Types B or A, but can be severe and can cause local epidemics.
[23] [26] Influenza D virus is distantly related to influenza C virus. While cattle workers have occasionally tested positive to prior influenza D virus infection, it is not known to cause disease in humans. [1] [11] [12] Influenza C virus and influenza D virus experience a slower rate of antigenic evolution than influenza A virus and influenza ...
Three virus families, Influenza virus A, B, and C are the main infective agents that cause influenza. During periods of cooler temperature, influenza cases increase roughly tenfold or more. Despite the higher incidence of manifestations of the flu during the season, the viruses are actually transmitted throughout populations all year round.
Avian influenza virus can survive for 100 days in distilled water at room temperature, and 200 days at 17 °C (63 °F). The avian virus is inactivated more quickly in manure, but can survive for up to two weeks in feces on cages. Avian influenza viruses can survive indefinitely when frozen. [57]
This is a timeline of influenza, briefly describing major events such as outbreaks, epidemics, pandemics, discoveries and developments of vaccines.In addition to specific year/period-related events, there is the seasonal flu that kills between 250,000 and 500,000 people every year and has claimed between 340 million and 1 billion human lives throughout history.
Influvac and its quadrivalent formulation are surface antigen subunit vaccines marketed by Mylan.. Influvac; Influvac Tetra [8]; They contain inactivated purified surface fragments (subunits) from the three different strains of the influenza virus (A/H1N1, A/H3N2, and Influenza B virus) that are selected and distributed by the World Health Organization, on the basis of their latest ...
Influenza ward at Walter Reed Hospital, in Washington, D.C., during the 1918 flu pandemic. An influenza pandemic is an epidemic of an influenza virus that spreads across a large region (either multiple continents or worldwide) and infects a large proportion of the population.
Viferon is a suppository of (non-pegylated [12]) interferon alpha-2b, ascorbic acid (vitamin C), and tocopherol (vitamin E) which was reported in two small studies to be as effective as arbidol. [ 13 ] [ 14 ] Another interferon alfa-2b medicine, "Grippferon", nasal drops, is used for treatment and emergency prevention of Influenza and cold. [ 15 ]