  In this paper we designed an efficient expert system to diagnose diseases for
human beings. The system depended on several clinical features for different
diseases which will be used as knowledge base for this system. We used fuzzy
logic system which is one of the most expert systems techniques that used in
building knowledge base of expert systems. Fuzzy logic will be used to
inference the results of disease diagnosing. We also provided the system with
multimedia such as videos, pictures and information for most of disease that
have been achieved in our system. The system implemented using Matlab ToolBox
and fifteen diseases were studied. Five cases for normal, affected and
unaffected people's different diseases have been tested on this system. The
results show that system was able to predict the status whether a human has a
disease or not accurately. All system results are reported in tables and
discussed in detail.
