Anatomical features of anti-viral immunity in the respiratory tract

David L Woodland1, Troy D Randall

  • 1Trudeau Institute, 154 Algonquin Avenue, Saranac Lake, NY 12983, USA.

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Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
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