Vietsub Xem Phim Trực Tuyến Full HD Có Phụ Đề Tiếng Việt. This critically acclaimed Vietnamese documentary portrays the claustrophobic struggles against COVID-19, led by a group of doctors and nurses, in an effort to save the lives of COVID infected pregnant women. Produced by national news channel VTV, "Ranh Giới", meaning "borderline", refers to the line between life and death.