The World Health Organization (WHO) says a campaign to distribute anti-malaria drugs to children in Nigeria's Borno state seems to be making an impact, with fewer cases reported. Nigeria is still the world's highest malaria-burdened country with 25% of all cases worldwide. As Timothy Obiezu reports from Maiduguri, there's still far more that needs to be done to check the spread of the disease. VOA Khmer's Leakhena Sreng narrates.