Actually, the Chinese have a large malaria control program. They get a lot of cases in southern China, especially along the border with Myanmar.
So do the (South) Koreans. They get a lot of malaria cases along the demilitarized zone, which has basically been left to return to a state of nature. This leads to stagnant water, which allows mosquitoes to breed.
But, of course, they spend a lot more money on malaria control in their own countries than in, say, Equatorial Guinea. Also, China and Korea are lucky in that the prevailing form of malaria is Plasmodium vivax -- which actually used to be called "benign tertian malaria." In terms of death rate, it's about as benign as the flu. Which is to say, not benign at all -- until you compare it to the other form of malaria.
So do the (South) Koreans. They get a lot of malaria cases along the demilitarized zone, which has basically been left to return to a state of nature. This leads to stagnant water, which allows mosquitoes to breed.
But, of course, they spend a lot more money on malaria control in their own countries than in, say, Equatorial Guinea. Also, China and Korea are lucky in that the prevailing form of malaria is Plasmodium vivax -- which actually used to be called "benign tertian malaria." In terms of death rate, it's about as benign as the flu. Which is to say, not benign at all -- until you compare it to the other form of malaria.