The affected animals are mostly young Asian elephants that had been born in captivity, with half the cases in North America being between the ages of one and four years (and three-quarters between one and eight years old). Some cases have affected newborns or adult elephants born in the wild (oldest aged 40 years), and three recorded cases have affected African elephants.[2][4] The first documented fatal case for African elephants was Kijana, an eleven-month-old male in 1996.[2][9] Since 2008, a number of cases have been attributed to EEHV1 among wild Asian elephants.[2][21]