Antibodies binding influenza virus, illustration

Bildnummer 13437523
Antibodies binding influenza virus, illustration
Antibodies binding influenza virus. Illustration of human antibodies (orange) neutralizing a influenza virus particle (blue). Each Y-shaped molecule has two arms that can bind to specific antigens. In doing this they mark bacterial or viral antigens for destruction by phagocytes - white blood cells that ingest and destroy foreign bodies. This marking and antigen presentation is called opsonisation. Immunoglobulin (Ig) antibodies bind to hemagglutinin (HA) or neuraminidase (NA) antigens on the surface of influenza virus particles, which prevents their attachment and infection of human cells. Influenza is in the orthomyxovirus group of viruses. It infects the respiratory tract and causes fever, aching muscles, a sore throat and fatigue. New strains of the virus develop rapidly, and can cause epidemics.
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Credit: Science Photo Library / NANOCLUSTERING
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