In the field of research, susceptibility refers to an individual's or system's vulnerability or predisposition to certain factors or stimuli, such as diseases, environmental stressors, or social influences. Researchers may study susceptibility in order to understand why certain individuals or groups are more prone to certain conditions or outcomes, and to develop strategies for mitigating or preventing such vulnerabilities. Susceptibility research can encompass a wide range of disciplines, including genetics, epidemiology, psychology, and sociology.