April 25 has this year been declared World Malaria Day. Since 2001, April 25 has been observed as Africa Malaria Day, commemorating the signing of the historic Abuja Declaration by 44 African malaria-endemic countries at the African Malaria Summit held in 2000. Despite all efforts, malaria continues to be a serious public health concern throughout the world. It affects over 100 countries and approximately 40 per cent of the world's population.