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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.
The word influenza comes from the Italian word influenza, from medieval Latin influentia, originally meaning 'visitation' or 'influence'. Terms such as influenza di freddo , meaning 'influence of the cold', and influenza di stelle , meaning 'influence of the stars' are attested from the 14th century.
During the worldwide Spanish flu pandemic of 1918, "Pharmacists tried everything they knew, everything they had ever heard of, from the ancient art of bleeding patients, to administering oxygen, to developing new vaccines and serums (chiefly against what we call Hemophilus influenzae – a name derived from the fact that it was originally considered the etiological agent – and several types ...
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.
Flu season is an annually recurring time period characterized by the prevalence of an outbreak of influenza (flu). The season occurs during the cold half of the year in each hemisphere . It takes approximately two days to show symptoms.
An adjuvant is a type of ingredient that is used to help the body's immune system create a stronger immune response after receiving the vaccination. [46] Aluminium is in a salt form (the ionic version of an element) and is used in the following compounds: aluminium hydroxide, aluminium phosphate, and aluminium potassium sulfate.
This is a function of the adaptive immune system. Therefore, by exposing a human, or an animal, to an immunogen in a controlled way, its body can learn to protect itself: this is called active immunization. The most important elements of the immune system that are improved by immunization are the T cells, B cells, and the antibodies B cells ...
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.