Out-of-work waiters and retail workers. Offhand estimate, that's the industry where many of my providers work in normally. Given that all restaurants in Illinois/Chicago were shut down, and stores are closing their doors, it's obvious where they're coming from.
It's a shame. There's a lot more talent coming online, but I'm going to stop hiring until the plague blows over.
I would not encourage hiring in this environment, but if people do, pay attention. This should prove to be a very interesting economic phenomenon.