Poor health and disability can be associated with morbidity. It is a condition of being diseased and can be used to describe demographically, how often a disease occurs within a population. Morbidity can be measured in terms of number of persons who were ill, illnesses these persons experienced, and the duration of these illnesses. Morbidity rate is a broad statistic that relates to the likelihood of developing or contracting a certain illness or event. Respiratory tract infections, hypertension, tuberculosis, heart disease etc. are the leading causes of morbidity. Low dose of aspirin is the most common preventative measure taken to reduce morbidity.