Could not have a bowel movement for about 8 days; Numbness and tingling in both of their legs; Paralyzed; Swelling of their spine (transverse myelitis); Still has no control of when they need to urinate; Numbness and tingling in both of their legs; Second dose not taken even after 55 days; Patient can use a walker with the strength of their upper body to swing their legs on to the bed; This spontaneous case was reported by a consumer and describes the occurrence of PARALYSIS (Paralyzed), MYELITIS TRANSVERSE (Swelling of their spine (transverse myelitis)), CONSTIPATION (Could not have a bowel movement for about 8 days), URINARY INCONTINENCE (Still has no control of when they need to urinate), HYPOAESTHESIA (Numbness and tingling in both of their legs) and PARAESTHESIA (Numbness and tingling in both of their legs) in a 28-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 054C21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Muscle spasm. Concomitant products included CYCLOBENZAPRINE for Muscle spasms, SERTRALINE, GABAPENTIN, VITAMIN C [ASCORBIC ACID], VITAMIN D NOS and ZINC for an unknown indication.    On 05-Jun-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 29-Jul-2021, the patient experienced MYELITIS TRANSVERSE (Swelling of their spine (transverse myelitis)) (seriousness criteria hospitalization and medically significant), CONSTIPATION (Could not have a bowel movement for about 8 days) (seriousness criterion hospitalization), URINARY INCONTINENCE (Still has no control of when they need to urinate) (seriousness criterion hospitalization), HYPOAESTHESIA (Numbness and tingling in both of their legs) (seriousness criterion hospitalization) and PARAESTHESIA (Numbness and tingling in both of their legs) (seriousness criterion hospitalization). On 31-Jul-2021, the patient experienced PARALYSIS (Paralyzed) (seriousness criteria hospitalization and medically significant). In August 2021, the patient experienced WALKING AID USER (Patient can use a walker with the strength of their upper body to swing their legs on to the bed). On an unknown date, the patient experienced INCOMPLETE COURSE OF VACCINATION (Second dose not taken even after 55 days). The patient was hospitalized on 31-Jul-2021 due to HYPOAESTHESIA, MYELITIS TRANSVERSE, PARALYSIS and URINARY INCONTINENCE. The patient was treated with Physical therapy (Three times a week) for Paralysis. In August 2021, CONSTIPATION (Could not have a bowel movement for about 8 days) had resolved. At the time of the report, PARALYSIS (Paralyzed) and URINARY INCONTINENCE (Still has no control of when they need to urinate) had not resolved, MYELITIS TRANSVERSE (Swelling of their spine (transverse myelitis)), HYPOAESTHESIA (Numbness and tingling in both of their legs), PARAESTHESIA (Numbness and tingling in both of their legs) and WALKING AID USER (Patient can use a walker with the strength of their upper body to swing their legs on to the bed) outcome was unknown and INCOMPLETE COURSE OF VACCINATION (Second dose not taken even after 55 days) had resolved.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.       Other relevant concomitant included multivitamin and glycoin.  Treatment medications included high dose steroids.  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.; 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.