Peace and blessings be upon you. Yes ,he created the earth. Yes, he created the disease. But what we can't never suspect that everything happen for a wisdom. and the good was always the base and the bad was always the exception. we live in health and the disease visit us few times in our life .as without the illness we wasn't going to understand that the health is a blessing ,and its importance , we wasn't going to search in medicine and look for science. the God created the poison and from the poison we get the antidote. During Wars ,we made the great inventions. The earthquakes don't exceed minute from the age of the earth but it is so necessary ,this or the earth will rupture. Suffering is necessary to test our faith ,our trust in the God. It is necessary for each creature to know that there is a power higher than everything can torture us whenever he wants . this power control everything , own to troture us and own to forgive us. The God control everything and everything happen by his Will. Any accusation to the God by disability or injustic is not accepted.