1999:H9N2傳染人類

padding-bottom: 73.6%;">

1999：H9N2傳染人類1999: H9N2 Infects Humans

第一次出現在人體內。禽類可能是病毒來源。Appeared for the first time in humans. It caused illness in two children in Hong Kong, with poultry being the probable source.