No, I think either way is acceptable. I only wonder if they avoided the term disease for some other reason. I just added the definition to show it seems to be synonymous with illness. Usually, as I see it more frequently used, mental disorders are described using the term illness. Undoubtedly someone will come up with an exception.So pops91710, you mean that despite what bibliolept and I think...defining stress as a 'disease' would have been better than 'illness anyway?!?!