Why does the U.S. Government have a patent on Ebola?

Patent No. is CA2741523A1

Is the Ebola strain they patented different then the one being talked about now? 
The CDC does hold a patent on an Ebola strain known as Ebola Bundibugyo, but the strain that is currently spreading is Zaire Ebola, not EboBun [1, 2]. The CDC was given the patent in 2010, and while some have suggested that the government made a profit off of the patent, David Sanders, a professor of biological sciences at Purdue University and a leading Ebola researcher, told Newsmax Health that it is not uncommon for the government to patent microbes developed in their labs [1]. The CDC lets researchers work with the strain without fees [1]. The CDC's only reason to patent a virus is for industrial purposes, such as licensing, and to control the strain [1, 2].
The specific strain of Ebola that the US government holds a patent on is the EboBun strain of the Ebola virus. [1][2] This is not the same strain that is currently circulating, which is the Zaire Ebola strain (EBOV). [1]  The CDC initially patented the Ebola virus in 2010, at a time when the area of human gene patents was not as legally clear as it became following a Supreme Court decision a few years later. [3][4] Some speculate that the patent was granted in order to control the strain for commercial purposes, such as licensing the strain for vaccine production. [2] Others assert that the patent is merely a strategy to prevent for-profit patenting of the strain. [3] 