Nearly 4.8 million children miss measles vaccination every year in the south-east Asia region, including in the 'big six' countries -- Bangladesh, India, Indonesia, Myanmar, Nepal and Thailand, the World Health Organisation (WHO) said.
"Eliminating measles would avert half a million deaths, while controlling rubella and Congenital Rubella Syndrome would promote health of pregnant woman and infants," said Dr Poonam Khetrapal Singh, regional director of WHO (south-east Asia).
While Bhutan and Maldives eliminated measles last year, the other countries in the region are carrying out large-scale immunisation drives to achieve it.
Nearly 38 million children are born in the region every year, of whom approximately 87 per cent receive the first dose of measles-containing vaccine.
"It means around 4.8 million children are deprived of the most basic protection against measles each year," WHO said.