The Department of Health (DOH) confirmed Tuesday another polio case, the fourth since its re-emergence in the Philippines.
The fourth case is from Mindanao. The DOH did not disclose details about the victim.
The confirmation came after tests performed by the Research Institute for Tropical Medicine and the National Institute of Infectious Diseases in Japan, Health Secretary Francisco Duque said in a statement.
Duque also said the DOH is implementing a targeted vaccination campaign for all children below the age of 5 in the municipalities of the third and fourth cases.
The third confirmed case is a 4-year-old girl from Datu Piang town in Maguindanao, who did not receive any oral polio vaccine (OPV).
The next round of polio vaccinations will cover the whole of Mindanao and is scheduled on November 25 to December 8, 2019.
Last September 19, the DOH confirmed the re-emergence of polio in the Philippines, 19 years after the World Health Organization declared the country polio-free.
Aside from the cases in Lanao del Sur and Maguindanao, the DOH also recorded in September a polio case in Laguna.
Polio is a highly contagious disease caused when the polio virus invades the nervous system.
Symptoms include fever, fatigue, headache, vomiting, stiff neck and sudden onset of floppy arms or legs. Severe polio cases can also lead to permanent paralysis or even death.