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Influenza Vaccine. Vaccine efficacy or vaccine effectiveness is the percentage reduction of disease cases in a vaccinated group of people compared to an unvaccinated group.For example, a vaccine efficacy or effectiveness of 80% indicates an 80% decrease in the number of disease cases among a group of vaccinated people compared to a group in which nobody was vaccinated.
Polyvalent influenza vaccine. Polyvalent influenza vaccine is a type of influenza vaccine that provides immunity against more than one type of antigen. [1] In the second week after receiving the flu shot, the body's immune system is triggered by the antigens so the body starts producing antibodies. These antibodies help fight against influenza ...
D04536. Influenza vaccines, colloquially known as flu shots, are vaccines that protect against infection by influenza viruses. [ 14][ 15] New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes. [ 14] While their effectiveness varies from year to year, most provide modest to high protection against ...
Pfizer Inc. ( / ˈfaɪzər / FY-zər) [ 3] is an American multinational pharmaceutical and biotechnology corporation headquartered at The Spiral in Manhattan, New York City. The company was established in 1849 in New York by two German entrepreneurs, Charles Pfizer (1824–1906) and his cousin Charles F. Erhart (1821–1891).
Operation Warp Speed ( OWS) was a public–private partnership initiated by the United States government to facilitate and accelerate the development, manufacturing, and distribution of COVID-19 vaccines, therapeutics, and diagnostics. [ 1][ 2] The first news report of Operation Warp Speed was on April 29, 2020, [ 3][ 4][ 5] and the program was ...
Influenza B virus is the only species in the genus Betainfluenzavirus in the virus family Orthomyxoviridae . Influenza B virus is only known to infect certain mammal species, including humans, ferrets, pigs, and seals. [ 4][ 5] This limited host range is apparently responsible for the lack of influenza pandemics associated with influenza B ...
COVID-19 vaccine effectiveness was studied in adults without immunocompromising conditions in 10 US states between December 18, 2021 – June 10, 2022, when Omicron was prevalent. 3 doses of mRNA COVID-19 vaccines was 69% against COVID-19–associated hospitalization 7–119 days after the third vaccine dose and 52% against COVID-19 ...
mRNA vaccine. An mRNA vaccine is a type of vaccine that uses a copy of a molecule called messenger RNA (mRNA) to produce an immune response. [ 1] The vaccine delivers molecules of antigen -encoding mRNA into immune cells, which use the designed mRNA as a blueprint to build foreign protein that would normally be produced by a pathogen (such as a ...