It's easy to think of the immune system as a single thing that gives us resistance to infection and toxins. In fact, it is a complex network of cells, tissues and organs that work together to protect the body. Organs like the thymus and lymph nodes - as well as our bone marrow - are key to immune function, as are our white blood cells (leukocytes) which seek out and fight off infection.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/how-to-boost-your-immune-system