Immunology microbiology immune response

Immunity: is the body's ability to fight off harmful micro-organisms the immune system produces antibodies or cells that can deactivate pathogens. Fungi protozoans bacteria and viruses are all potential pathogens Infectious disease :is one in which minute organisms invisible to the naked eye invade and multiply within the body. Many of these organisms are contagious that is they spread between people in close contact An antibiotic : a protein produced in response to an antigen. is a chemical substance derivable from a mold or bacterium that kills microorganisms and cures infections . The Immune response the immune system does when confronted by an antigen.- An immune response is an elaborate interplay between antigen non-specific defenses and B and T lymphocytes.- Immune responses can be innate or adaptive.