My fault. Sorry.

I should have showered when I landed, but I was too excited about exploring the planet.

I would start by narrowing your inquiry... just a little bit.

Which disease do you mean or is all diseases.

Interesting Question.

We can analyze on three dimensions I think:

1) Health and Disease type: communicable and no communicable diseases.

2) Métabolism, immunological, hereditary and mental conditions.

3) External environmental and behaviral conditions.

The two last bad conditions may influence the first dimension.

Dear Obed

thanks for your question.

in this paper you can find good answers to your question:

Some diseases are as a result of man's sinful nature.

Through man's disrespect to nature.

i agree with Dr. Aaron

Following.