900-degree Centigrade Burns Ebola To Death?!

I have actually been wondering how could we ensure that Ebola Virus never come back again!!
I saw this cool tweet on WHO handle!! I also thought 900 degree centigrade would have been the best. See tweet below

But some still believe that heat 900-degree centigrade is not enough ooo... Maybe 1000-degree centigrade will just be okay.... see their response below;