The entry of the deadly avian influenza virus through migratory birds needs immediate preventive steps. And the Philippines have geared up with taking actions. They have stepped up surveillance of 55 wetlands across the country. The H5N1 strain of bird flu has infected 121 people in four Asian countries and killed 62, according to the World Health Organization (WHO). The WHO has warned that a global pandemic could cause economic losses costing billions of dollars. “We see the threats coming from two things — migratory birds and smuggling of game fowl, live poultry or exotic birds coming from avian influenza-affected countries,” said Ruben Pascual, coordinator of the Philippines’ National Avian Influenza Task Force.