The immune response to infection

The immune response to an infection begins with recognition of an intruding pathogen. As the most common site of infection in an animal is typically the skin or mucosa, immune cells known as phagocytes are present in these areas to identify potential pathogens. Phagocytes attack pathogens through the process of phagocytosis, while also releasing signaling molecules called cytokines, which recruit other immune cells to the site of infection and cause inflammation.