Zoonosis are infectious diseases that have been transmitted between animals and humans or in its advanced stage from human to human. It also can be transmitted from human to animal, when that happens it is called reverse zoonosis Emerging zoonosis are infectious diseases that are newly recognized or newly evolved while re-emergence zoonosis have occurred previously but have more recently shown an increase in incidence or expansion into a new geographic, host or vector range. The concept of ‘emerging
and one horse trainer severely ill, resulting in death. [7, 8] This disease was isolated by scientists and later classified as the Hendra virus. The Hendra virus (HeV), previously unknown, is now classified under the family Paramyxoviridae, genus Henipavirus along with its sister viruses the Nipah Virus and Cedar virus.[7, 9] HeV has the capability of causing fatal diseases in several animal species including humans.[1] The primary host of the Hendra virus was identified as the flying fox species from