Who comes when the world goes Code Blue? A novel method of exploring job advertisements for COVID-19 in health care.

We found 952 job advertisements, 72% of which were from the United States. There was a lag period between reported COVID-19-confirmed cases and job advertisements by several weeks. Nurses were the most advertised position in every country. Frontline workers were substantially more demanded than coordination or decision-support roles. Job advertisements are a novel data source which leverages a readily available information about how workforces respond to a pandemic. The initial phases of the response emphasise the importance of frontline workers, especially nurses.