Several horses in hendra had fallen ill and died, followed by one of their trainers.
The Nipah virus, scientists quickly realized was similar to hendra, which quickly led researchers to bats.
hendra was named after the Brisbane, Australia, suburb where it was first reported in 1994.
Of the three reported hendra cases, two were fatal, according to the Centers for Disease Control.
In Malaysia and Bangladesh, a devastating infectious neurological disease emerged just a few years after hendra.