A notable experiment provided compelling evidence for the link between stress and immune vulnerability. In the study, 276 healthy volunteers were first interviewed to assess their recent stressful life experiences. Subsequently, they were administered nasal drops containing a common cold virus. The findings revealed that participants who had been dealing with chronic stressors for more than a month, particularly those stemming from work or relationship problems, were substantially more likely to catch a cold than participants who reported no chronic stressors.