The poliovirus has been found in some two dozen specimens from the community, suggesting that its carriers are actively “disseminating” or spreading the disease in their populations, said the health department on Wednesday.
Twenty-six of the 142 samples taken from water bodies and sewage plants tested positive for polio, of which 25 were from the National Capital Region and 1 was from Davao City.
Duque again encouraged parents to have their children aged 5 years and below vaccinated against polio.
The National Institute of Infectious Diseases of Japan has confirmed the presence of poliovirus types 1 and 2, according to the DOH.
In September, the DOH confirmed the re-emergence of polio in the Philippines, almost two decades after the World Health Organization declared the country free from the disease.