Idiopathic thrombocytopenic Purpura; Bruising; Pain; Vision abnormal; Pain in leg; Tiredness; This spontaneous case was reported by a consumer and describes the occurrence of IMMUNE THROMBOCYTOPENIA (Idiopathic thrombocytopenic Purpura) in a 52-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 038B21A and 017C21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concomitant products included DEXAMETHASONE for an unknown indication.   On 07-Apr-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 04-May-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On an unknown date, the patient experienced IMMUNE THROMBOCYTOPENIA (Idiopathic thrombocytopenic Purpura) (seriousness criterion medically significant), CONTUSION (Bruising), PAIN (Pain), VISUAL IMPAIRMENT (Vision abnormal), PAIN IN EXTREMITY (Pain in leg) and FATIGUE (Tiredness). At the time of the report, IMMUNE THROMBOCYTOPENIA (Idiopathic thrombocytopenic Purpura), CONTUSION (Bruising), PAIN (Pain), VISUAL IMPAIRMENT (Vision abnormal), PAIN IN EXTREMITY (Pain in leg) and FATIGUE (Tiredness) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 26-Aug-2021, Platelet count: 8000 (Low) had only 8000 platelets instead of 150000 to 300000. On 08-Sep-2021, Platelet count: 33000 (Low) Low. On 15-Sep-2021, Platelet count: 107000 (Low) Low. On 20-Sep-2021, Platelet count: 104000 (Low) Low. On an unknown date, Platelet count: 9000 (Low) 9000 platelets when she went to oncologist after 1 round of steroids..     The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   Patient experienced thigh pain, and pain in the back of her leg. Patient states  vision very bad after taking steroids patient started steroids for 3 rounds of steroids: It was 10 pills of 4mg at a time of Dexamethasone  40mg , for 4 days on and 4 days off. after steroid patient taken treatment medication globulin for 4 weeks of IV medication Concomitant medications included vitamins.  Lab data included Blood test, CBC test  Company Comment: This case concerns a 52-year-old, female patient with no previous relevant medical history reported, who experienced the unexpected event of immune thrombocytopenia. The event occurred on an unknown number of days after the second dose of mRNA-1273. The rechallenge was unknown as the events have not resolved. The reporter assessed the events as possible. The benefit-risk relationship of mRNA-1273 is not affected by this report.; Sender's Comments: This case concerns a 52-year-old, female patient with no previous relevant medical history reported, who experienced the unexpected event of immune thrombocytopenia. The event occurred on an unknown number of days after the second dose of mRNA-1273. The rechallenge was unknown as the events have not resolved. The reporter assessed the events as possible. The benefit-risk relationship of mRNA-1273 is not affected by this report.