1. accidents or incidents at work which have, or could have, led to the release or escape of coronavirus (SARS-CoV-2) (dangerous occurrences).
2. a person at work (a worker) having been diagnosed as having COVID-19 attributed to an occupational exposure to coronavirus (a case of disease).
3. the death of a worker as a result of occupational exposure to coronavirus (a work-related death due to exposure to a biological agent).
