- © Copyright of Vietnamnet Global.
- Tel: 024 3772 7988 Fax: (024) 37722734
- Email: evnn@vietnamnet.vn
Update news Polio virus
Using both types of polio vaccine could speed up efforts to free the world of the disease, research suggests.
A strain of the polio virus has been found at an international airport in Brazil, but there are no human cases, the World Health Organization has said.