DAVAO CITY ——The City Health Office (CHO) is holding two more rounds of anti-polio immunization for three types of poliovirus in February and March. CHO was prompted to hold another set of vaccination in the extended “Sabayang Patak Kontra Polio” following the reported case of Type 1 poliovirus in Sultan Kudarat and in Quezon City. DOH extended its Sabayang Patak Kontra … [Read more...] about Davao to hold two more rounds anti-polio immunization