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Reference.org
Nonspecific immune cell
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<p>A non-specific immune cell is an <a href="/facts/Immune_cell/vsDunUK0">immune cell</a> (such as a <a href="/facts/Macrophage/z7hkQu3o">macrophage</a>, <a href="/facts/Neutrophil/KL6oTt8b">neutrophil</a>, or <a href="/facts/Dendritic_cell/19KBuKFK">dendritic cell</a>) that responds to many <a href="/facts/Antigen/9JlAernG">antigens</a>, not just one antigen. Non-specific immune cells function in the first line of defense against infection or injury. The innate immune system is always present at the site of infection and ready to fight the bacteria; it can also be referred to as the "natural" immune system. The cells of the innate immune system do not have specific responses and respond to each foreign invader using the same mechanism. </p>