Away from the healthcare system, the same simple mitigations that will help the healthy not spread it as much will apply. So, for example in your industry, better access to hand sanitisers in crew rooms & perhaps even on units to help them keep key surfaces clean, offer face masks if they want them, and just generally encouraging crews to observe simple things like covering mouths when showing cold or flu like symptoms, keeping mess areas clean & uncluttered, respecting a bit more personal space etc. Of course for people suffering anything more than mild symptoms encouraging staying at home & seeking medical advice will be key, which of course will lead to potentially crew shortages & cancellations. TOCs will have to get used to this concept, the government will have to change agreements to allow for it without punishment, and we the general public will have to accept that from time to time that our trains might get cancelled.