Handy man" refers to which type of hominid?

In January 1964, the team announced the new species Homo habilis. The name was suggested by Raymond Dart, and means “handy man,” in reference to this hominidssupposed tool making prowess. Leakey believed that habilis was a direct human ancestor, with erectus out of the picture.

If i remember correctly it was caused by people hurling bodies at a country for some reason and them they all became infected