Outrageously Funny Word Dictionary :: Retroinfection

👉 In immunology, a retroinfection is a scenario in which an immune response to a particular pathogen does not involve any specific antigen. This means that the body's immune system has already been exposed to the same antigen before it was first encountered during infection or vaccination. When the body's immune system encounters this antigen for the second time after being previously exposed, it will recognize it as foreign and begin to produce antibodies against it. These antibodies can then cross-react with other antigens and cause an

retroinfection