Even though it’s Saturday, John had to go to work today. Oh, the joys of working in healthcare. And yes, that was sarcasm.
With him gone Sherlock has abandoned all pretence of being a sensible adult and resting up. Instead he has thrown himself back into research to finally solve the Itzek Diamond theft. What a surprise. I. am. so. shocked. Yes, once more, sarcasm.
(what little he has, anyway) has returned to his skin, and the cough has gotten a lot better, as well. Mind you, he is still far from being fully recovered.