Andrew, I almost forgot to mention to you: you can see my documentary across the world in 5 different languages. It's sub-titled in simplified and traditional Chinese. Most of the film focuses on sub-clinical infections and how to detect them with molecular diagnostics. Let me know if you would like to watch it online. It's on DVD but available outside the country online. At the end of the year it will be available everywhere online.
See
Why Am I Still Sick?