Check with your GP (in other words, don't blame me if this is wrong or wouldn't be suitable for you) but I have just been told about an elderly Chinese lady who was diagnosed with the virus. She was admitted to hospital and the family asked that she be given Vitamin C. The clinicians resisted but later agreed on the basis that Vitamin C was so cheap. She was given it intravenously and recovered.
From personal experience a few years ago I had a bad cough (I put it down to pioneering). Anyway a kind Christian lady (not a JW) took pity on me and told me about the benefits of high dose Vitamin C. She told me to go out and get Vitamin C with Riboflavinoids and take double the daily dose - she said the Riboflavinoids were important. She also told me that one clove of garlic would stop my cough for an hour. It did. She also recommended I make a tea of fresh grated ginger, with 2 tsp of cinnamon - let it brew and strain it, add honey and sip. It sooths the cough. All that she told me worked.
None of the stuff the GP tried worked. But what she told me helped. In the end the real cure was to stop pioneering because I think the cough was stress induced from not getting proper rest.