1/hach do la hach bach huyet,tren co the con nguoi,hach do co o tat ca moi noi,khi co the nhiem khuan,hay ngoai co the goi la bi benh se noi len de chong lai vi khuan.

2/ HIV : suy giam mien dich. Nhung benh thuong se xuat hien khi HIV xam nhap,neu chuan doan qua trieu chung thi ban co the co rat nhieu benh.

-minh tu van cho ban roi tren chatbox,nen yen tam di