I have heard that the C&TS is running limited service out of Antonito, Colorado (I presume that they turn around at Osier). There probably wont be anything out of Chama until the New Mexico state authorities sound the All-Clear. Passengers riding out of Antonito will be required to wear face masks and undergo a temperature check. People running a fever will NOT be allowed to board.
I fear that the tourist railroads most likely to survive are the ones near major population areas AND with open air or open windows.