I live in Bavaria - the primary school 1km from my work is closed with a confirmed case, and a grammar school in our administrative area is completely closed - over 1000 children. A long list of schools in the nearest city are closed.
If my older children's secondary school closed they'd be home alone (they're good kids if a bit lazy). If our youngest's primary school closed and the older ones were off too they'd look after him (he's 9 and also a good kid).
However if just the primary closed the youngest couldn't be home alone every day. He'd be alone for 6.5 hours (from when the teens leave until they get back) but adultless for even longer - ten hours some days. Obviously that's too long.
I work shifts in a health/ social work role so sometimes I'm home but other times I'm at work for 20 hour blocks (6 hours of which we are on-call but have to stay on site and can sleep if no emergencies).
DH works in an office job and his actual employer is encouraging home working but he's on long term loan to a company with major security in place who don't allow anyone to log in remotely. He could do a small amount from home - the odd day - but not every day.
My boss did ask if I knew what I'd do - I'm the only one with young (non adult) children full time - there's also a dad who has his son eow. Grandparents on the team also said they'd want time off to look after their grandchildren though, so their children can work. This smarts a bit as we have no wider family support since MIL died suddenly three years ago. MIL would have been there for us, with FIL alongside. However FIL lost all interest in the children once they'd helped him over the initial phase of grief and started dating again, is usually uncontactable and certainly not a source of childcare. So it smarts a bit that when my boss asked me if I had options the grandparents fell over themselves to assert a claim to any allowance that might be available to me, so they could do their adult children's childcare.
We will still have to work in hazmat suits and quarantine protocol even if we have confirmed cases on the team or among the residents. We already have the energy packs and protocol from our employer. It's not a facility which can be shut down under any circumstances.