U.N. health agencies have made huge strides in reducing the number of children dying from measles. Measles deaths among children under five years of age have fallen by 89 percent from more than one million to 118,000 in 2008. The biggest successes have been made in Africa.

Unfortunately, starting in 2008, WHO says progress has stagnated because of a big decline in funding and lessening of political commitment for measles control.

Indeed, Dr. Strebel says measles, one of the most contagious diseases, is making a rapid comeback. Over the past year, he says there have been large measles outbreaks in 37 countries, 30 of them in Africa.

Over the past 12 months, he says more than 64,000 measles cases have been reported and more than 1,100 measles deaths in the African region alone.

"The countries that have experienced the most deaths include Zimbabwe, Chad and Nigeria," Strebel adds. "More alarmingly, WHO estimates if the combined effect of decreased financial and political commitment were to be sustained or continued, this could result to a return of a half a million measles deaths each year by 2012, wiping out the gains made over the past 18 years."

Dr. Strebel says the Millennium Development Goal aimed at reducing child mortality by two-thirds by 2015 will be missed if measles outbreaks continue to spread. He says it costs less than $1.00 to vaccinate a child against measles. It costs less than $1.00 to save a child's life.