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Flu A and flu B are two different strains of influenza, explains Thomas Russo, M.D., professor and chief of infectious disease at the University at Buffalo in New York.
Different lineages of influenza have risen and persisted, similar to the way other viruses work, Ray explains, like the coronavirus. The two most severe and most common flu strains are type A and ...
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 virus mainly infects humans but has been identified in seals, horses, dogs, and pigs. [23] Influenza B virus does not have subtypes like influenza A virus but has two antigenically distinct lineages, termed the B/Victoria/2/1987-like and B/Yamagata/16/1988-like lineages, [1] or simply (B/)Victoria(-like) and (B/)Yamagata(-like).
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]
Even though there have been two different lineages of influenza B viruses that were circulating during most seasons, flu vaccinations were long meant to protect against three different flu viruses: the influenza A(H1N1), influenza A, and one type of influenza B virus. [26]
Dr. Shah explains that the flu shot typically contains up to four different inactive strains covering the two main types of flu: A and B. Getting the flu shot, he says, does not mean someone gets ...
The following is a list of strains for the Northern Hemisphere influenza season recommended by the World Health Organization.Starting in the 2012–2013 season, the recommendation shifted to include the composition of a quadrivalent influenza vaccine (QIV) that contains both influenza B lineages, alongside a trivalent influenza vaccine (TIV) containing one influenza B lineage.