{"batchcode": "PFIZER ER1742", "histograms": [{"histogram": {"Cellulitis": 1, "Chest discomfort": 1, "Dizziness": 1, "Interchange of vaccine products": 1, "Oropharyngeal pain": 1, "Pain in extremity": 1, "Rash erythematous": 1, "Skin warm": 1, "Vaccination site erythema": 1, "Vaccination site swelling": 1, "Vaccination site warmth": 1}, "batchcodes": ["042D21A", "PFIZER ER1742"]}]}