Zuckerberg revealed the donation in a post on Facebook (of course), the site that has made him into the $33 billion man he is today.
In a status update, Zuckerberg compared the disease to Polio and HIV, noting that 8,400 people have already been infected by Ebola and that it has the potential to spread quickly. Here's his full update:
Fellow tech billionaire Bill Gates announced last month that his foundation would give $50 million to fight Ebola, the largest donation that the Bill and Melinda Gates Foundation has ever made to a humanitarian cause.
CORRECTION: This post previously misidentified the number of people infected with Ebola. It has been fixed.