A blood analyzer comprising: a first sample preparation unit configured to prepare, from a blood sample, a first measurement sample for measuring a red blood cell infected with malaria; a second sample preparation unit configured to prepare, from the blood sample, a second measurement sample for measuring intrinsic fluorescence of a red blood cell; a light source unit configured to apply light to the first measurement sample and the second measurement sample; a detection unit (63, 64) configured to detect fluorescence and scattered light generated from the first measurement sample to which light has been applied, and detect intrinsic fluorescence generated from the second measurement sample to which light has been applied; and an information processing unit configured to generate information about malaria infection based on fluorescence and scattered light detected from the first measurement sample, and generate information about iron-deficiency anemia based on intrinsic fluorescence detected from the second measurement sample, wherein the information processing unit outputs display information for simultaneously outputting, to a display unit, the information about malaria infection and the information about iron-deficiency anemia, wherein the information about malaria infection includes a result of comparison between a number of malaria-infected red blood cells or a ratio of the number of malaria-infected red blood cells to a number of red blood cells, and a threshold value for determining possibility of malaria infection, the information about iron-deficiency anemia includes a result of comparison between a number of red blood cells that generate intrinsic fluorescence or a ratio of the number of red blood cells that generate intrinsic fluorescence, to a number of red blood cells, and a threshold value for determining possibility of iron-deficiency anemia, and the information processing unit generates an alerting flag in a case where the result of the comparison with the threshold value for determining possibility of malaria infection indicates that malaria infection is likely to occur, and the result of the comparison with the threshold value for determining possibility of iron-deficiency anemia indicates that iron-deficiency anemia is likely to occur. a first sample preparation unit configured to prepare, from a blood sample, a first measurement sample for measuring a red blood cell infected with malaria; a second sample preparation unit configured to prepare, from the blood sample, a second measurement sample for measuring intrinsic fluorescence of a red blood cell; a light source unit configured to apply light to the first measurement sample and the second measurement sample; a detection unit (63, 64) configured to detect fluorescence and scattered light generated from the first measurement sample to which light has been applied, and detect intrinsic fluorescence generated from the second measurement sample to which light has been applied; and an information processing unit configured to generate information about malaria infection based on fluorescence and scattered light detected from the first measurement sample, and generate information about iron-deficiency anemia based on intrinsic fluorescence detected from the second measurement sample, wherein the information processing unit outputs display information for simultaneously outputting, to a display unit, the information about malaria infection and the information about iron-deficiency anemia, wherein the information about malaria infection includes a result of comparison between a number of malaria-infected red blood cells or a ratio of the number of malaria-infected red blood cells to a number of red blood cells, and a threshold value for determining possibility of malaria infection, the information about iron-deficiency anemia includes a result of comparison between a number of red blood cells that generate intrinsic fluorescence or a ratio of the number of red blood cells that generate intrinsic fluorescence, to a number of red blood cells, and a threshold value for determining possibility of iron-deficiency anemia, and the information processing unit generates an alerting flag in a case where the result of the comparison with the threshold value for determining possibility of malaria infection indicates that malaria infection is likely to occur, and the result of the comparison with the threshold value for determining possibility of iron-deficiency anemia indicates that iron-deficiency anemia is likely to occur.