I have felt much better today, thank you all for your well wishes.
Back at work I still had an annoying cough but otherwise felt almost back to normal at last.
Tonight I had a long chat with ET or rather several chats wth him. The upshot which I really didn't see coming was that he has been thinking about his future career. He started off by asking me what I thought he should do for his two weeks work experience which is part of his college course. He then proceeded to tell me what he had been thinking about. He showed me a website, we looked at the different possibilities, the locations, the different specialist options. He went through a mock situation test, he looked at the info about training.
He is thinking about a career that I would never in a million years have predicted that he would opt for.
He wants to join the RAF !!!