OneWorld South Asia: Secretary-General Ban Ki-moon will announce a global initiative Friday that steps up the fight against malaria – seeking to eventually wipe out a tropical scourge blamed for killing a million people a year. In a video message for a World Malaria Day event at UN headquarters, Ban said the initiative would offer indoor spraying and bed nets treated with long-lasting insecticide “to all people at risk, especially women and children in Africa.” It will also ensure that …