{"batchcode": "EWD177", "histograms": [{"batchcodes": ["EWD177"], "histogram": {"Magnetic resonance imaging": 2, "Asthenia": 1, "Blood test": 1, "Fatigue": 1, "Headache": 1, "Interchange of vaccine products": 1, "Limb discomfort": 1, "Migraine": 1, "Neck pain": 1, "Pain": 1, "Pain in extremity": 1, "Vaccination site swelling": 1}}]}