Nurses will not lose their work or income during this time. In fact MORE nurses will be needed in coming weeks and months. However, as nurses will be working on the "front lines", they are more at risk of being exposed to coronavirus, and thus are not a good choice for those who are in-home hosts offering a room in their home. Travel nurses are better suited for entire place listings during this global pandemic.
Some hosts have expressed the viewpoint that military and National Guard will eventually be deployed to build more hospitals as the pandemic grows, and that these people will need housing, and that private accomodations might be safer for them than to be sharing space in standard hotels. If that is the case you might look toward that, though this is less certain than the need for housing of standard travel nurses.