A condition or illness directly relating to an earlier condition, but which develops some time after the first illness.

the aftermath of particular disease such as permanent damage to the heart after rheumatic fever.

(Reber) Any abnormal condition resulting from a disease which continues chronically after the disease has been cured (plural: sequelae).

plural = sequelae: (noun) an after effect of disease or injury. A secondary result. New Latin, from Latin sequel (1793).

any abnormality following or resulting from a disease or injury or treatment; "paralysis is one of the sequelae of poliomyelitis"

A condition following or caused by a previous disease; an after effect of illness.

The full disease process.

A sequela, (IPA ) (plural sequelae) is a pathological condition resulting from a disease, injury, or other trauma. Chronic kidney disease, for instance, is sometimes a sequela of a food-borne illness; post-traumatic stress disorder may be a psychological sequela of rape.