{"batchcode": "10/31/2021", "histograms": [{"batchcodes": ["01/16/2021", "02/13/2021", "05/26/2022", "10/31/2021"], "histogram": {"COVID-19": 1, "Fatigue": 1, "Oropharyngeal pain": 1, "Pyrexia": 1, "Rhinorrhoea": 1, "SARS-CoV-2 test positive": 1}}]}