Disease susceptibility refers to the likelihood of an individual developing a specific illness or condition. This susceptibility can be influenced by various factors, including genetics, environment, and lifestyle choices. For example, individuals with a family history of diabetes may have a higher risk of developing the disease themselves. Additionally, certain populations may be more susceptible to specific diseases due to genetic predispositions or environmental exposures. Factors such as age, sex, and overall health can also play a role in determining how vulnerable a person is to illnesses like heart disease or cancer. Understanding these factors can help in prevention and treatment strategies.