Dear student,
Ebola virus causes Ebola haemorrhagic fever which is transmitted fromanimals to human and the spreads from human to human. This disease has around 50% fatality rate, and 65% in extreme cases. Whereas AIDS is caused by Human immunodeficiency (HIV)virus. It's a kind of STD(sexually transmitted disease).In this case, the fatality rate is 80-90% if it is untreated. If the disease is detected in the initial stage then it could be controlled through medication, but cannot be permanently cured. Thus, AIDS is more fatal as compared to Ebola.
Regards.