Maintaining a strong and healthy immune system is very important. The immune response is a complicated system which has many different sub-systems and several kinds of cells and signalling pathways. Our bodies' response is so complex in fact that there are whole textbooks devoted to laying out our current understanding of the immune system. However, what is important to point out is that the symptoms that we suffer from when we catch a cold or flu are not due to the direct presence of a virus or bacteria within the body but rather to our own bodies' immune response to those external pathogens. Thus, one might ask whether is is smart to always be 'boosting immunity' or whether we might actually be worsening cold and flu symptoms by taking immune-boosting supplements?
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