One of my favorite sub-Reddits is r/WritingPrompts.
Someone posted the prompt:
Sherlock Holmes becomes very ill . As his symptoms get worse, Watson books a flight to the United Stated to get him fixed by the best doctor he knows, Dr Gregory House.
Here is a very entertaining offering: https://www.reddit.com/r/WritingPrompts/comments/4ok50k/eu_sherlock_holmes_becomes_very_ill_as_his/d4ddxwg