reed blodd cells/hemoglobin down; white blood cells down; possible lymphoma; platelets down; Spleen enlarged; liver enlarged; Not feeling well overall; Dizziness; Throwing up bile; shortness of breath; Consumer called 3Jun2021 regarding her father who within the last 4 weeks has declined significantly; This spontaneous case was reported by a consumer and describes the occurrence of DYSPNOEA (shortness of breath), GENERAL PHYSICAL HEALTH DETERIORATION (Consumer called 3Jun2021 regarding her father who within the last 4 weeks has declined significantly), HEPATOMEGALY (liver enlarged), ANAEMIA (reed blodd cells/hemoglobin down), LYMPHOPENIA (white blood cells down), LYMPHOMA (possible lymphoma), THROMBOCYTOPENIA (platelets down), SPLENOMEGALY (Spleen enlarged), MALAISE (Not feeling well overall), DIZZINESS (Dizziness) and VOMITING (Throwing up bile) in an 86-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     No medical history was provided by the reporter.  The patient's past medical history included Blood transfusion (Patient has had 4 blood transfusions, has been hospitalized). Concomitant products included FLUOXETINE HYDROCHLORIDE (PROZAC), COLECALCIFEROL (VITAMIN D3), IRON, OMEPRAZOLE (PRILOSEC [OMEPRAZOLE]), MACROGOL 3350 (MIRALAX), DOCUSATE SODIUM (COLACE), WARFARIN SODIUM (COUMADIN), ASPIRIN [ACETYLSALICYLIC ACID], CYANOCOBALAMIN (VITAMIN B12 [CYANOCOBALAMIN]) and ATORVASTATIN CALCIUM (LIPITOR) for an unknown indication.   On 28-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 26-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. In May 2021, the patient experienced MALAISE (Not feeling well overall) (seriousness criterion hospitalization), DIZZINESS (Dizziness) (seriousness criterion hospitalization) and VOMITING (Throwing up bile) (seriousness criterion hospitalization). On an unknown date, the patient experienced DYSPNOEA (shortness of breath) (seriousness criterion hospitalization), GENERAL PHYSICAL HEALTH DETERIORATION (Consumer called 3Jun2021 regarding her father who within the last 4 weeks has declined significantly) (seriousness criterion hospitalization), HEPATOMEGALY (liver enlarged) (seriousness criteria hospitalization and medically significant), ANAEMIA (reed blodd cells/hemoglobin down) (seriousness criterion hospitalization), LYMPHOPENIA (white blood cells down) (seriousness criterion hospitalization), LYMPHOMA (possible lymphoma) (seriousness criteria hospitalization and medically significant), THROMBOCYTOPENIA (platelets down) (seriousness criteria hospitalization and medically significant) and SPLENOMEGALY (Spleen enlarged) (seriousness criteria hospitalization and medically significant). The patient was hospitalized for 7 days due to DYSPNOEA and GENERAL PHYSICAL HEALTH DETERIORATION. The patient was treated with OMEPRAZOLE (PRILOSEC [OMEPRAZOLE]) at an unspecified dose and frequency; CYANOCOBALAMIN (VITAMIN B12 [CYANOCOBALAMIN]) at an unspecified dose and frequency and IRON at an unspecified dose and frequency. At the time of the report, DYSPNOEA (shortness of breath), GENERAL PHYSICAL HEALTH DETERIORATION (Consumer called 3Jun2021 regarding her father who within the last 4 weeks has declined significantly), HEPATOMEGALY (liver enlarged), ANAEMIA (reed blodd cells/hemoglobin down), LYMPHOPENIA (white blood cells down), LYMPHOMA (possible lymphoma), THROMBOCYTOPENIA (platelets down), SPLENOMEGALY (Spleen enlarged), MALAISE (Not feeling well overall), DIZZINESS (Dizziness) and VOMITING (Throwing up bile) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In 2021, Biopsy bone marrow: unknown (Inconclusive) Inconclusive. In 2021, Biopsy liver: unknown (Inconclusive) Inconclusive. In 2021, Blood smear test: unknown (Inconclusive) Inconclusive. In 2021, Haemoglobin: low (Low) Low. In 2021, Platelet count: low (Low) Low. In 2021, Red blood cell count: low (Low) Low. In 2021, White blood cell count: low (Low) Low.         Concomitant medications also include an inhaler (unspecified).  Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded. Further information has been requested.; Sender's Comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded. Further information has been requested.