As nouns the difference between morbidity and mortality
is that morbidity
is the quality of being unhealthful, morbid while mortality
is the condition of being susceptible to death.
The quality of being unhealthful, morbid, sometimes including the cause.
(medicine) The incidence of a disease, as a rate of a population which is affected.
(medicine, countable) An occurrence of illness or disease, or a single symptom of that illness.
(medicine, countable) Adverse effects caused by a medical treatment such as surgery.
The condition of being susceptible to death.
(demography) The death rate of a population.