For the first time, researchers say, a vaccine against malaria has shown that it can save children from infection or death.
The vaccine, tested on thousands of children in Mozambique, was hardly perfect: It protected them from catching the disease only about 30 percent of the time and prevented it from becoming life-threatening only about 58 percent of the time.
But because malaria kills more than a million people a year, 700,000 of them children, even partial protection would be a public health victory. The disease, caused by a parasite carried by mosquitoes, is found in 90 countries, and drug-resistant strains are spreading.
Thank goodness. Hopefully this will lead to an even more effective vaccine. I worry, though, that it will be impossible to vaccinate enough children - especially if it has to be repeated several times.