Chong virus bang khang the co hai loai:
1/ Active: dung nhung khang sinh giong virus nhung khong gay doc hai dua vao co the de co the tao ra khang the chong lai nhung khang nguyen nay va cung chong lai virus.
2/ Passive: dung huyet thanh cua benh nhan A da khoi benh virus tiem vao mot benh nhan B khac dang nhiem virus de nho khang the cua A tieu diet virus trong co the B.
Bai nay la noi ve phuong phap so 2