Neither the seizures nor the broken arm are recordable. Injuries and illnesses that result solely from non-work-related events or exposures are not recordable under the exception in 1904.5(b)(2)(ii). Epileptic seizures are a symptom of a disease of non-occupational origin, and the fact that they occur at work does not make them work-related. Because epileptic seizures are not work-related, injuries resulting solely from the seizures, such as the broken arm in the case in question, are not recordable.