👉 Retrieval-infection is a concept that bridges cognitive psychology and infectious disease, suggesting that the brain's ability to recall information can influence susceptibility to infections. When an individual has recently retrieved information from memory, such as learning about a virus or its symptoms, this process can temporarily weaken their immune system. This phenomenon, known as "immunological stress," occurs because the energy and resources required for intense mental activity are diverted away from immune functions. As a result, the body becomes more vulnerable to infections during periods of high cognitive demand, such as exams or stressful situations. Conversely, after a period of rest or reduced mental activity, the immune system can recover, potentially offering better protection against pathogens.