Working on construction sites and anxiety

[AnnieAnxious]

This pandemics brought a side of me out that I didn't even know I had!
Schools are closed so both children at home whilst I'm attempting to homeschool around working from home part time work. I feel safer with them at home but OH isn't able to work from home (construction sites) He's out at work again today, different site to yesterday and the day before. He and his friend run a small Ltd company and so due to how they get paid are not eligible for any government help so whilst they are able to work they are doing.
I'm extremely anxious with this new variant that OH will catch it and pass it to me and then he will be left to look after two children whilst I'm in hospital. I'm overweight, not the 40 bmi but close, I do try to exercise daily, 30 minutes jog and currently trying to loose weight, no formal underlying issues but haven't needed to visit the doctors for a long time as I'm rarely ill so could have issues.
Myself and hubby are having lots of arguments because I keep reminding him masks and distance. A good percentage of the sites he is working on have implemented updated procedures but sometimes due to the nature of the work he can't always distance.
I've just spoken to him today and was chatting about something when it came up about distance again and he said they tried to remain 2m but at times it may have been slightly less.
I know I'm probably panicking more than I should be and if he was at the same place every day with the same people I wouldn't worry as much but over the course of this month he will be on at least five different sites so coming into contact with different people regularly, one of those sites being in an area where there are cases over a 1000, per 100,000!
For my sanity how do I learn to relax; he can't afford to shut down because no money will come in then and the business they have built up would disappear.
What can we do as a family to ensure we can stay safe?

You are hugely over anxious. If you catch it (assuming you haven't already and don't know you did) then the chances of you being hospitalised are vanishingly small. Almost all people who have caught the Covid virus have either had no symptoms at all, or have, at worst, had what is like a bad case of flu. Real flu, not a cold. There is very little chance you will be in hospital at all. He is doing his best to show adequate care in a difficult industry. That's all he can do.

Moondust001 thanks for the reply.
I know of several people my age and weight that have ended up in hospital and two a little older who have died, so that's probably why I'm panicking.
I think my other concern is that we and his friend families are following rules but know of plenty of people who aren't and so I worry with him coming into contact with so many people that he will catch it and in turn pass it on to me.
Two of the sites he is working on this month are obviously critical but the others aren't.