Human hookworms (Necator americanus， Ancylostoma duodenale， and Ancylostoma ceylanicum) are intestinal blood-feeding parasites that infect ~500 million people worldwide and are among the leading causes of iron-deficiency anemia in the developing world. Drugs are useful against hookworm infections， but hookworms rapidly reinfect people， and the parasites can develop drug resistance. Therefore， having a hookworm vaccine would be of tremendous benefit.
Human hookworms (Necator americanus， Ancylostoma duodenale， and Ancylostoma ceylanicum) are intestinal blood-feeding parasites that infect ~500 million people worldwide and are among the leading causes of iron-deficiency anemia in the developing world. Drugs are useful against hookworm infections， but hookworms rapidly reinfect people， and the parasites can develop drug resistance. Therefore， having a hookworm vaccine would be of tremendous benefit.
