Influenza A Vs B Vaccine

Influenza b viruses generally change more slowly in terms of their genetic and antigenic properties than influenza a viruses especially influenza a h3n2 viruses.

Influenza a vs b vaccine. Trivalent vaccines protect against an influenza a h1n1 virus an influenza a h3n2 virus and one influenza b virus even though there are two different lineages of b viruses that both circulate during most seasons. 16 2020 influenza is still going strong in the united states and isn t expected to slow down for at least several more weeks according to a report from the cdc. For trivalent influenza vaccines for use in the us for the 2020 2021 influenza season depending on the manufacturing method of the vaccine the committee recommended that the a h1n1 pdm09 a h3n2 and b victoria lineage viruses recommended above for the quadrivalent vaccines be used. What s more this season s.

There are two lineages of influenza b. That influenza a infections account for 75 percent of confirmed seasonal influenza infections overall. Influenza b viruses are not divided into subtypes but instead are further classified into two lineages. Before sharing sensitive information make sure you re on a federal government site.

Federal government websites often end in gov or mil. Influenza b infections account for the remaining 25 percent. Specifically the strain in circulation is known as influenza b victoria v1a 3 subgroup while the strain in the flu shot is known as influenza b victoria v1a 1 subgroup. While most confirmed infections.

Influenza b viruses mutate more slowly than influenza a viruses.