Calling to work that he's ill

Because everyone is so afraid for the mexican flu my working son is told he's not welcome at his job, a shop, when he doesn't feel well.

So this morning I woke him up at 7 because he had to call work in time so they could ask someone else to cover for him.

No one there.

8.30 Colleagues have arrived, but none can handle a call about illness. But someone would be in at 8.

8.01 Another call. No one has arrived yet. But someone knows management will be in at 9.

Let's hope so.
It'll be too late to call in a substitute, because the shop is already full functioning at 8.