The immune system is a body's defense against the defense to fight against foreign invaders or organisms, including viruses, bacteria, and fungi. The immune system consists of three lines of defense, including physical and chemical barriers, non-specific innate immunity, and specific, adaptive immunity.
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Query: Hi doctor, Why do we always have runny nose when we catch flu or cold? How do we get flu? I have headache and fever for almost a week. My tongue is sometimes white and lymph is a bit painful to touch but not swollen. Are these the symptoms of flu? Read Full »
Answer: Hi, Welcome to icliniq.com. When we get viral or bacterial infection in the nasal tract (upper respiratory tract- nose to throat), the local mucus membrane gets irritated. It leads to more secretion from mucus membrane and that leads to running nose. The fluid is secreted to eliminate the bacteri... Read Full »