The term disability leave means to take leave from work for one of many possible reasons. Under the Americans with Disabilities Act, (ADA), disability leave is used to refer to leave, taken by a disables employee, as a reasonable accommodation. Leave may also refer to leave allowed under an employer's policy regarding short- or long-term disabilities. The term may be used loosely also to refer to sick leave; time off from work for health reasons, whether paid or unpaid, that is not covered under an employer's disability policy. Finally, the Family & Medical Leave Act (FMLA) permits certain employees with a serious health condition to take a leave of absence. A serious health condition under the FMLA is an illness, injury, impairment, or physical or mental condition that involves incapacity or treatment. The incapacity or treatment must require absence of more than three calendar days from work and involves continuing treatment from a health care provider.