Although in India the number of total infections has decreased by nearly half since 1996, the number of infections caused by the deadliest form of malaria has increased fourfold in 30 years.
That, advocates say, has come thanks to the breaking down of traditional borders.
In an interview with ABC News, Jai Narain, the director of the WHO's communicable diseases section in South East Asia, said, "The tendency of someone to be infected and then move to another part of the world -- the disease can move much faster than before."
Also, thanks to global warming, mosquitoes can now survive at 6,000 feet above sea level instead of just 3,600 feet.
The WHO warns that some parts of the country, especially at the base of the Himalayas, have only a third of the medical staff they need to cope with outbreaks. "The major emphasis we are pushing is that all the countries need to scale-up contingencies for these outbreaks. Until this scale-up occurs, we will not have much impact on malaria," Narain told ABC News.