????:1????????:????????

2????????

3???????????

4???????

5??????????

???????????6?????????????5?,???,??H5N2????????

?,??????,????4?????17??????????????????????????????????????????????,??4??????????24????????????????,????????

???????5?22???????????????,?????????,???????????H5N2??

????,??????????H5N2???????????????,?????H5????????????,?????????????,???H5N2???

?????????,????,???????????H5?????,???????,?????????????????????????H5N2????????????????(?????? ??????)

?:??????????