How long does influenza IgM positive last?

Written by Yuan Qing
Pulmonology
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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Can H1N1 flu be treated?

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What are the symptoms of pharyngitis and influenza?

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Can rhinitis be treated with antibiotics?

Influenza can be treated with antibiotics, but there must be appropriate indications and signs for their use. After influenza infection, the human body may experience a decline in immunity due to the virus, especially a decrease in lymphocytes, which makes it particularly susceptible to bacterial infections. These bacteria are likely to cause bacterial inflammation, with the main symptoms being cough, coughing up yellow phlegm, or having a runny nose with yellow nasal discharge. If such yellow or purulent secretions are observed, they generally indicate a bacterial infection, and it is advisable to boldly use some antibiotics for treatment. Antibiotics that are less toxic, have fewer side effects, and have strong antimicrobial activity should be chosen; such antibiotics often yield very satisfactory results.