The term is sometimes used broadly to include injuries , disabilities , disorders , syndromes , infections , symptoms , deviant behaviors , and atypical variations of structure and function , while in other contexts these may be considered separate categories . In this broader sense , it sometimes includes injuries , disabilities , disorders , syndromes , infections . Isolated symptoms , deviant behaviors , and atypical variations of structure and function , while in other contexts and for other purposes these may be considered distinguishable categories .