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Influenza, commonly known as the flu, is an infectious disease caused by influenza viruses.Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue.
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.
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.
Treatments for influenza include a range of medications and therapies that are used in response to disease influenza.Treatments may either directly target the influenza virus itself; or instead they may just offer relief to symptoms of the disease, while the body's own immune system works to recover from infection.
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.
A 2021 study found the common flu vaccine provided immunity to the flu in 58% of recipients. [6] The measles vaccine fails to provide immunity to 2% of children that receive the vaccine. However, if herd immunity exists, it typically prevents individuals who are ineffectively vaccinated from contracting the disease. [ 7 ]
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.