NANJING, China (AP) — Three teenage athletes from the Ebola-affected region of Africa will not be allowed to compete at the Youth Olympics in China because of the risk of possible infection, the IOC and local organizers said Friday.

All athletes and officials from the four West African nations affected by the deadly virus will be “subject to regular temperature and physical assessment” for the duration of the games, which open Saturday in the eastern city of Nanjing.