An illness is considered work-related by OSHA “if an exposure at work either caused or contributed to the onset of symptoms or aggravated existing symptoms to the point that they meet OSHA recordability criteria.” This includes COVID-19 infections despite a stay being put on COVID-19 enforcement action. It is usually simpler to determine work-related injuries, but not always. If an activity at work aggravates an employee´s existing condition – and the employer knew about the existing condition in advance – this could also be a reportable violation of OSHA under the General Duty clause.