Influenza, generally referred to as Flu, is an infectious respiratory disease. It is caused by certain strains of the Influenza virus and is characterized by fever, headache, muscular pain, and weakness.
Antigens or immunogens are substances that can stimulate an immune response by producing antibodies against it. Antigens can be proteins or polysaccharides of microorganisms, toxins, foreign blood cells, cells of transplanted organs, etc.
Antibodies or Immunoglobulins are immune proteins found in blood or lymph, and produced by B lymphocytes as an immune defense against protein substances (antigens). They combine with the very antigen that triggers their synthesis to neutralize their action.
Interferons are a group of Glycoproteins produced by Leucocytes, T-lymphocytes, and Fibroblasts as an immune response to viral infection or tumor cells.
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