Vitamins in illness.
D000368:Aged; D001205:Ascorbic Acid / Q000627:therapeutic use; D001206:Ascorbic Acid Deficiency / Q000453:epidemiology; D006801:Humans; D014802:Vitamin A Deficiency / Q000453:epidemiology; D014804:Vitamin B Deficiency / Q000453:epidemiology; D014815:Vitamins / Q000627:therapeutic use*
D014815:Vitamins; D001205:Ascorbic Acid