also, unprepared hospital workers get infected and spread the disease also. In 1st world countries the workers take necessary precautions. Disease has a positive purpose in life in that it eliminates the stupidest and most careless. (you can be informed and still be careless).
yes there are certain wild animals that are carriers of the ebola virus which are killed and eaten by the Africans. While butchering it they get contaminated by the blood.