Blood clot; Aggravated diverticulitis; Chills; Massive headache; cant raise hand over head; covid arm; she did not feel good; Urinary infection; Platelet crash; her platelet had gone from 314 to 14; This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of THROMBOSIS (Blood clot), DIVERTICULITIS (Aggravated diverticulitis), CHILLS (Chills), HEADACHE (Massive headache), VACCINATION SITE MOVEMENT IMPAIRMENT (cant raise hand over head), VACCINATION SITE REACTION (covid arm), FEELING ABNORMAL (she did not feel good), URINARY TRACT INFECTION (Urinary infection) and THROMBOCYTOPENIA (Platelet crash; her platelet had gone from 314 to 14) in a 56-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 003B21A and 027B21A) for COVID-19 vaccination.     Concomitant products included LISINOPRIL and LEVOTHYROXINE for an unknown indication.   On 18-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 15-Apr-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 01-May-2021, the patient experienced URINARY TRACT INFECTION (Urinary infection) (seriousness criterion hospitalization). On 02-May-2021, the patient experienced THROMBOCYTOPENIA (Platelet crash; her platelet had gone from 314 to 14) (seriousness criteria hospitalization and medically significant). On an unknown date, the patient experienced THROMBOSIS (Blood clot) (seriousness criteria hospitalization and medically significant), DIVERTICULITIS (Aggravated diverticulitis) (seriousness criteria hospitalization and medically significant), CHILLS (Chills) (seriousness criterion hospitalization), HEADACHE (Massive headache) (seriousness criterion hospitalization), VACCINATION SITE MOVEMENT IMPAIRMENT (cant raise hand over head) (seriousness criterion hospitalization), VACCINATION SITE REACTION (covid arm) (seriousness criterion hospitalization) and FEELING ABNORMAL (she did not feel good) (seriousness criterion hospitalization). The patient was hospitalized for 9 days due to THROMBOCYTOPENIA. At the time of the report, THROMBOSIS (Blood clot), DIVERTICULITIS (Aggravated diverticulitis), CHILLS (Chills), HEADACHE (Massive headache), VACCINATION SITE MOVEMENT IMPAIRMENT (cant raise hand over head), VACCINATION SITE REACTION (covid arm), FEELING ABNORMAL (she did not feel good), URINARY TRACT INFECTION (Urinary infection) and THROMBOCYTOPENIA (Platelet crash; her platelet had gone from 314 to 14) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 02-May-2021, Platelet count: low (Low) had a complete platelet crash; her platelet had gone from 314 to 14. On an unknown date, Blood potassium: low (Low) Low. On an unknown date, Blood sodium: low (Low) Low.         Antibiotics used as a treatment medication. Treatment: Blood transfusion. It was reported that patient went to the emergency room and had a complete platelet crash.her platelet had gone from 314 to 14. She was hospitalized for 9 days getting blood transfusion.  Company Comment: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.   This case was linked to MOD-2021-273541 (Patient Link).; Sender's Comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.