So-called 'travel nurses' make up less than one percent of the nursing workforce, totalling 50,000 in number.
But according to Reuters, the coronavirus has stepped up the call for their services.
US hospitals are bracing for a surge of coronavirus patients just as some staff are under quarantine after being exposed to the virus.
They're facing a shortage of temporary nurses who can fill in - and being asked to pay as much as double to make it worth it.