Countries where the immunization rate against measles is below 80 per cent are Afghanistan, Azerbaijan, India, the Lao People’s Democratic Republic, Papua New Guinea, the Philippines, Samoa, Solomon Islands, Timor-Leste and Vanuatu. In several other countries, however, efforts continue to strengthen routine services in order to ensure consistently high coverage. It is estimated that about 77 million children under 5 years of age are underweight in developing countries in Asia and the Pacific and are therefore at risk. These babies are at a higher risk of suffering breathing difficulties, having feeding problems, having lower immunity to infections and having problems maintaining their body temperature. In 2011, almost 15 million babies were born preterm worldwide, which represents more than 1 in 10 babies.