The main problem here is human body works in mysterious ways. We are by definition reacting different, and unfortunately statistics are not helping on this cas

The main problem here is human body works in mysterious ways. We are by definition reacting different, and unfortunately statistics are not helping on this case. Basically, we have: - too many illnesses (I guess 10% of top common health problems, covering 90% of all problems) - for each illness, we have N number of symptoms (which unfortunately all or only a subset of this can occur) - then we have fake symptoms (statistically out of threshold values but we are living fine with them) this is generating a big number of combinations. With this much combinations, it is requiring extensive amount of tests. As everything health is also optimized for the greater good. Which requires optimum cost management. So basically medicine today, with statistical approach, is happy to skip 1%, if it can fix 99% with 90% less cost.