👉 In the context of science and medicine, a "pyrogen" refers to substances that can cause an increase in the body's immune response. These substances include hormones, cytokines, and other chemicals produced by cells during the production of mucus or saliva. When these substances are released into the air, they can stimulate the immune system and contribute to the development of allergies, asthma, and other respiratory problems. Therefore, pyrogenous substances should be carefully monitored and controlled in order to maintain a healthy
