Antigens, commonly, are referred to as substances that are capable of triggering an immune response in a host, precisely by activating the lymphocytes or initiating antibody production against the infection. Depending upon the fact that they either enter the human body or originate within the body, these fungal antigens are classified as foreign or self-antigens. Among these, the self-antigens comprise of mutated or overexpressed proteins. However, foreign antigens may include fungus, bacteria, parasites, viruses, chemicals, and sometimes toxins & proteins found in food products.