👉 Preinfection is a concept in medical science, specifically within the field of infectious diseases. It refers to the initial stage of an infection before any symptoms are observed. During this time, the body's immune system recognizes and fights off the invading bacteria or virus without producing antibodies, which allows it to fight off the infection. In other words, preinfection is a general term that describes the initial stages of an infection where there is no noticeable symptom, such as fever, coughing, or difficulty