Query: What was my last immunization and when was it performed?, FHIR Resource: {'resourceType': 'Immunization', 'status': 'completed', 'vaccineCode': {'coding': [{'system': 'http://hl7.org/fhir/sid/cvx', 'code': '208', 'display': 'COVID-19, mRNA, LNP-S, PF, 30 mcg/0.3 mL dose'}], 'text': 'COVID-19, mRNA, LNP-S, PF, 30 mcg/0.3 mL dose'}, 'patient': {'reference': 'urn:uuid:57d7bafe-dd9a-5d19-847c-a6743f31a3ee'}, 'occurrenceDateTime': '2021-09-26T23:25:17+05:30', 'primarySource': True}