Out in Nebraska, legislators have filed a bill to make COVID-19 infections presumed to be compensable for first responders and other designated types of workers. Now, so far, I've been unable to find specifics about which categories of workers are included in this bill--which has not yet been passed into law, btw.
The other interesting aspect of this bill is that is specifies that no COVID-19 case can increase an employer's Workers Compensation insurance premiums, or experience rating, or modifier. So that should be an interesting thing to handle behind the scenes, if the bill passes as currently written.
Stay tuned for more details as I can find them out.