How long does influenza IgM positive last?
Updated on May 16, 2025
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Influenza IgM actually refers to a globulin released by our immune system after influenza enters our body and is recognized by the immune system. This globulin encapsulates or localizes the virus, aiding the phagocytic cells in our body to kill it. This is called IgM. IgM indicates the presence of the influenza virus and a recent invasion into the human body. It is a marker in body fluids and generally persists for about 14-20 days after infection. It does not provide long-term protection to our body and is merely a marker for the acute phase, disappearing once the situation stabilizes.
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