Baku, April 17 (AZERTAC). The child mortality reduced by two-thirds, from 93 children of every 1,000 dying before age five in 1990 to 31 of every 1,000 in 2015, UNICEF reports. About 29,000 children under the age of five -  21 each minute - die every day, mainly from preventable causes. More than 70 per cent of almost 11 million child deaths every year are attributable to six causes: diarrhoea, malaria, neonatal infection, pneumonia, preterm delivery, or lack of oxygen at birth. These deaths occur mainly in the developing world.  An Ethiopian child is 30 times more likely to die by his or her fifth birthday than a child in Western Europe. Among deaths in children, South-central Asia has the highest number of neonatal deaths, while sub-Saharan Africa has the highest rates. Two-thirds of deaths occur in just 10 countries. And the majority are preventable.  Some of the deaths occur from illnesses like measles, malaria or tetanus. Others result indirectly from marginalization, conflict and HIV/AIDS.  Malnutrition and the lack of safe water and sanitation contribute to half of all these children`s deaths. But disease isn`t inevitable, nor do children with these diseases need to die. Research and experience show that six million of the almost 11 million children who die each year could be saved by low-tech, evidence-based, cost-effective measures such as vaccines, antibiotics, micronutrient supplementation, insecticide-treated bed nets and improved family care and breastfeeding practices. These measures are the basis for UNICEF`s actions to help children survive, carried through with hundreds of allies and via offices in the field - and well-travelled staff - all over the world. UNICEF is the world`s largest purchaser of vaccines, procuring more than 40 per cent of all vaccines used in the developing world. While global immunization rates have risen from less than 20 per cent in the 1970s to about 74 per cent in 2002, millions of children must still be reached. UNICEF negotiates favourable prices and forecasts vaccines requirements to ensure sustainable supplies. Targets include increasing immunization coverage to at least 90 per cent at the national level and 80 per cent in all districts, with particular focus on reaching population groups with low coverage levels, and the final eradication of polio.