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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 influenza.
A universal flu vaccine would be a flu vaccine effective against all human -adapted strains of influenza A and influenza B regardless of the virus sub type, or any antigenic drift or antigenic shift. [1] [2] [3] [page needed] Hence it should not require modification from year to year in order to keep up with changes in the influenza virus.
Thomas Francis Jr. (July 15, 1900 – October 1, 1969) was an American physician, virologist, and epidemiologist who guided the discovery and development of the polio vaccine being worked on by his student Jonas Salk. Francis was the first person to isolate influenza virus in the United States, and in 1940 showed that there are other strains of ...
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.
A hexavalent vaccine, or 6-in-1 vaccine, is a combination vaccine with six individual vaccines conjugated into one, intended to protect people from multiple diseases. [ 1][ 8] The term usually refers to the children's vaccine that protects against diphtheria, tetanus, pertussis, poliomyelitis, haemophilus B, and hepatitis B, [ 1][ 8] which is ...
The Pfizer–BioNTech COVID-19 vaccine, sold under the brand name Comirnaty, [ 2][ 32] is an mRNA-based COVID-19 vaccine developed by the German biotechnology company BioNTech. For its development, BioNTech collaborated with the American company Pfizer to carry out clinical trials, logistics, and manufacturing. [ 44][ 45] It is authorized for ...
Sanofi Pasteur. Sanofi Pasteur is the vaccines division of the French multinational pharmaceutical company Sanofi. Sanofi Pasteur is the largest company in the world devoted entirely to vaccines. It is one of four global producers of the yellow fever vaccine.
Spanish flu (1918–1920) The 1918 flu pandemic, commonly referred to as the Spanish flu, was a category 5 influenza pandemic caused by an unusually severe and deadly Influenza A virus strain of subtype H1N1 . The difference between the influenza mortality age-distributions of the 1918 epidemic and normal epidemics.
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