ILC2, or type 2 innate lymphoid cells, are a type of immune cell that play a crucial role in the body's defense against parasites and in the regulation of allergic responses. They are primarily found in tissues such as the lungs, intestines, and skin. ILC2 cells are known for producing cytokines, which are signaling molecules that help coordinate the immune response. These cells are part of the innate immune system, meaning they respond quickly to threats without the need for prior exposure. ILC2 cells are particularly important in maintaining tissue homeostasis and promoting healing, making them a key focus in research related to asthma, allergies, and other inflammatory diseases.