The number of children confirmed to have polio in Papua New Guinea has increased to 21 according to the World Health Organisation.
Cases have been found in nine provinces - nearly half the country - since the outbreak was first discovered in Morobe in June.
One child has died.
Meanwhile, the WHO said a nationwide vaccination campaign has covered 92 percent of the country.
It said more than 3 million children have received their first round of vaccines.
It's pleading with parents to ensure their children receive their second and third doses.