{"batchcode": "028O20A", "histograms": [{"histogram": {"Headache": 2, "Blood pressure abnormal": 1, "Blood pressure measurement": 1, "Palpitations": 1, "Pruritus": 1, "Urticaria": 1, "Vaccination site erythema": 1, "Vaccination site pruritus": 1, "Vaccination site swelling": 1}, "batchcodes": ["028O20A"]}]}