Compare and contrast the two types of Ebola?

Each of the four filovirus strains contains seven proteins, four of which are unknown. The symptoms of all four strains are similar, but they have a varied kill rate. Ebola Zaire is the most deadly strain, with a kill rate of approximately 9 out of 10. Also identified in 1976, Ebola Sudan has a lower kill rate of approximately 7 out of 10. In contrast to both, Ebola Reston is harmless to humans but is deadly to monkeys. Finally, Marburg has a kill rate of approximately 3 out of 10. Of the four, only Reston is able to travel through the air easily.