morbidity

noun6

1. •
   The quality of being unhealthful or diseased, sometimes including the cause.
2. •
   An occurrence of illness or disease, or a single symptom of that illness.
3. •
   Adverse effects caused by a medical treatment such as surgery.
4. •
   The incidence of a disease, as a rate of a population which is affected.
5. •
   The sickness rate of a population.
6. •
   The quality of being morbid; an attitude or state of mind marked by gloom.