I wonder
 

It is sad that many people suffer when not diagnosed or when there is no possible treatment. Maybe much of what we have is inherited. I suppose it has to come from some place but it does not explain why the immune system starts to attack itself in some people who have inherited some kind of a tendency for the immune system to attack itself while, for others, it does not happen.

That would suggest environmental reasons as well, woudn't it? Perhaps a combination of both. Environment is not only to be understood as nature and pollution , as in the case of allergies, but also as emotional make-up, having to do with family or society.

There is one consolation about 'inheritance'. We also inherit a loving heart and love.

People die; love lives forever.