Hookworm Infections; Ancylostoma/growth & development; Anemia/etiology; Blood Proteins/metabolism; Digestion; Edema/etiology; Erythrocyte Aging; Female; Gastric Juice/metabolism; Heart Diseases/etiology; Hookworm Infections/blood; Hookworm Infections/complications; Hookworm Infections/epidemiology; Hookworm Infections/immunology; Hookworm Infections/metabolism; Hookworm Infections/mortality; Hookworm Infections/parasitology; Hookworm Infections/pathology; Hookworm Infections/physiopathology; Humans; Hypoproteinemia/etiology; Immunity; Intellectual Disability/etiology; Intestinal Absorption; Intestines/pathology; Iron/metabolism; Kidney/physiopathology; Larva Migrans/parasitology; Liver/physiopathology; Necator/growth & development; Pregnancy; Pregnancy Complications, Infectious