By mid-1999, more than 265 human cases of encephalitis, including 105 deaths, had been reported in Malaysia, and 11 cases of either encephalitis or respiratory illness with one fatality were reported in Singapore.
Pada pertengahan 1999, lebih dari 265 kasus manusia terkena ensefalitis, termasuk 105 kematian, dilaporkan di Malaysia, dan 11 kasus baik penyakit ensefalitis atau penyakit pernapasan dengan satu kematian dilaporkan di Singapura.