Definitely nowhere near lambing or aborting ewes - the biggest risk is infected birth materials / fluids. And yes, these bugs can be carried on clothing, so those in contact with the pregnant mother must also be very careful about not wearing the same clothes in her presence and so on.
One of the animal team here is currently pregnant so we have been looking into it too. I’m not enthralled by the prospect of having to shower and change all my clothes every time I want to go to the farmhouse, I must say! But we’ve only 9 in-lamb ewes so it shouldn’t be too arduous.
As to bottle-feeding a four-day old cade lamb, I’m sure my colleague would do it, but with suitable rigorous personal hygiene, just in case.
However, we are a small holding, no young cats, no history so far of lamb abortions (though we did have a cow with a mummified calf a year ago), and any cade lambs would be born here and we’d know their history. We might feel differently about cades from elsewhere
Oh - and heptavac doesn’t cover the abortion bugs, by the way.