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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.
[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 ...
Nancy J. Cox was born in 1949 and is a native of Curlew, Iowa. [4] She was educated at Iowa State University, graduating in 1970 with a degree in Bacteriology. [5] [4] Dr. Cox was awarded a Marshall Scholarship to study in England at the University of Cambridge at Darwin College, Cambridge, where in 1975 she earned a doctoral degree in virology.
Pages in category "Deaths from influenza" The following 85 pages are in this category, out of 85 total. This list may not reflect recent changes. A. Abbhantripaja;
Swine influenza virus (SIV) or swine-origin influenza virus (S-OIV) refers to any strain of the influenza family of viruses that is endemic in pigs. [2] As of 2009, identified SIV strains include influenza C and the subtypes of influenza A known as H1N1 , H1N2 , H2N1, H3N1 , H3N2 , and H2N3 .
US influenza statistics by flu season. From the Centers for Disease Control and Prevention page called "Disease Burden of Flu": "Each year CDC estimates the burden of influenza in the U.S. CDC uses modeling to estimate the number of flu illnesses, medical visits, hospitalizations, and deaths related to flu that occurred in a given season.
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.
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.