{"batchcode": "PFIZER EN6207", "histograms": [{"batchcodes": ["EN6204", "FF2787", "PFIZER EN6207"], "histogram": {"Breast swelling": 1, "Muscular weakness": 1, "Peripheral swelling": 1}}, {"batchcodes": ["PFIZER EN6207"], "histogram": {"Breast swelling": 1, "Breast tenderness": 1, "Chills": 1, "Dizziness": 1, "Fatigue": 1, "Headache": 1, "Lymphadenopathy": 1, "Nausea": 1, "Pyrexia": 1, "Tenderness": 1, "Tinnitus": 1}}]}