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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. The influenza A and B versions ...
Influenza B viruses contribute to seasonal epidemics alongside influenza A viruses but have never been associated with a pandemic. [23] Influenza C virus, like influenza B virus, is primarily found in humans, though it has been detected in pigs, feral dogs, dromedary camels, cattle, and dogs.
The influenza B virus genome is 14,548 nucleotides long and consists of eight segments of linear negative-sense, single-stranded RNA.The multipartite genome is encapsidated, each segment in a separate nucleocapsid, and the nucleocapsids are surrounded by one envelope.
Flu season is an annually recurring time period characterized by the prevalence of an outbreak of influenza, caused either by Influenza A or by Influenza B. The season occurs during the cold half of the year in temperate regions; November through February in the northern hemisphere and May to October in the southern hemisphere.
Based on an FDA analysis, the test correctly identified 99% of negative and 92% of positive SARS-CoV-2 samples; 99.9% of negative Flu A and B samples; and 92.5% and 90.5% of positive Flu A and Flu ...
Flu A, particularly H1N1, accounts for the majority of cases, though flu B, which is often more severe in children, is also being reported. Flu symptoms doctors are seeing in kids this season.