A sequela (UK: /sɪˈkwlə/,[1] US: /sɪˈkwɛlə/;[2][3] usually used in the plural, sequelae /-/) is a pathological condition resulting from a disease, injury, therapy, or other trauma. Derived from the Latin word, meaning “sequel”, it is used in the medical field to mean a complication or condition following a prior illness or disease.[4]

A typical sequela is a chronic complication of an acute condition—in other words, a long-term effect of a temporary disease or injury—which follows immediately from the condition. Sequelae differ from late effects, which can appear long after—even several decades after—the original condition has resolved.

In general, non-medical usage, the terms sequela and sequelae mean consequence and consequences.[5]

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