Pigs sent two people in the central province of Quang Binh to the hospital in the same week.
Nguyen Thi Hoai, 54, was given emergency surgery and a blood transfusion at the Vietnam-Cuba Dong Hoi hospital after a feral pig she was raising mauled her while she was feeding it.
The woman suffered deep injuries to her thigh and buttocks that led to the heavy blood loss.
She said the hog was a hybrid between a wild hog and a domesticated pig.
Ho Van Thay, 52, suffered injuries to both arms and legs when a different wild boar attacked him while he was working in a field on the edge of the jungle.
Wild boars, bison and elephants have been attacking people and damaging fields in the area, recently, raising questions about the extent of human encroachment into their jungle habitats.