It will all end at some point, that I can give you a reassurance of. It isn't going to go on forever.
In the meantime, I and my colleagues (many of whom have underlying health conditions ourselves as well as vulnerable family members at home) will continue to work in high risk areas because we don't have a choice not to.
It may help you to instigate some of the practices that we have put in place. Ask your husband to keep a change of clothes at work for working in (assuming he doesn't have to wear a uniform, in which case he should keep that at work and change into it on arrival). Shoe covers if he doesn't have separate shoes for home and work.
When he leaves, he should put his uniform either in the workplace wash bags, or a pillow case to bring home and wash.
He comes home, strips off at the door and his clothes plus pillowcase of uniform go into a hot wash. He goes directly into a shower, if he can come into the house via a door close to a bathroom so much the better and if he can shower before he leaves work that's better still.
Once he's showered and in clean clothes then he says hello to you all.
He should stick to using only one car if you have two and minimise anything he takes into work. Phone can go in a clear ziplock bag for work, touch screen stuff will still work and it keeps the phone clean for home use. Pens should be disposable and wiped down with alcohol wipes frequently, his ID badge should be left outside "red" areas if possible or failing that, wiped with alcohol wipes on leaving.
Have an isolation area at home for anything which he needs to take to work and bring home with him, otherwise see if there's somewhere safe he can leave everything at work so the only vector of transmission is him, and reduce that risk as best you can.
Many of my colleagues are moving out of home and into sleepouts, motels, colleagues' spare rooms etc for the duration of this, to minimise the risk of bringing it home to their families. Horrific and I don't blame you for being scared. We all are. Kia kaha 