Patient was not able to walk; Patient was not able to stand up; Patient was not able to sit ,Patient was not able to do anything; This spontaneous case was reported by a consumer and describes the occurrence of GAIT INABILITY (Patient was not able to walk), DYSSTASIA (Patient was not able to stand up) and HYPOKINESIA (Patient was not able to sit ,Patient was not able to do anything) in a 91-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     Concurrent medical conditions included Diabetes mellitus insulin-dependent (Start date included: 30 years ago. The patient was taking the treatment, but did not provided the names of the medications. There was no recent change in status such as improvement or worsening), Hypertension (Start date included: 30 years ago. There was no recent change in status such as improvement or worsening.), Hypercholesterolemia (Start date included: 30 years ago. There was no recent change in status such as improvement or worsening.), Drug allergy (Allergies to medications, food and other products.) and Food allergy.    On 10-Apr-2022, the patient received fourth dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) .25 milliliter. On 11-Apr-2022, the patient experienced GAIT INABILITY (Patient was not able to walk) (seriousness criterion hospitalization), DYSSTASIA (Patient was not able to stand up) (seriousness criterion hospitalization) and HYPOKINESIA (Patient was not able to sit ,Patient was not able to do anything) (seriousness criterion hospitalization). The patient was hospitalized for 3 days due to DYSSTASIA, GAIT INABILITY and HYPOKINESIA. At the time of the report, GAIT INABILITY (Patient was not able to walk), DYSSTASIA (Patient was not able to stand up) and HYPOKINESIA (Patient was not able to sit ,Patient was not able to do anything) had not resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Computerised tomogram: negative (Negative) Doctors made a CT scan to discard a stroke or something else, but everything was negative..         No concomitant medication was reported.  No treatment medication was reported. The patient previously received 1st, 2nd and 1st booster dose of Pfizer vaccine (dates not provided), and 2nd booster dose of Moderna COVID-19 Vaccine on 10Apr2022. The patient did not experience any symptom after Pfizer vaccine. One day after 2nd booster dose from Moderna, the patient was not able to walk, stand up, sit or do anything, and at 5 p.m., The symptoms were not improving, called 911 and an ambulance came to take her to a hospital. The patient was admitted in ER and doctors made a CT scan to discard a stroke or something else, but everything was negative. The patient spent 3 days at the hospital, and after that the patient was transferred to a rehab facility. The patient remains being treated because symptoms are not improving. The patient never had COVID + test or diagnosis. No other vaccine given within 1 month prior to Moderna COVID-19 vaccine. Adverse event caused patient to seek medical care ER, hospitalized, rehab facility. The patient did not experience a similar event in the past. The symptoms were not improving.; Sender's Comments: This spontaneous case concerns a 68-year-old, male patient with relevant Concurrent medical history included Diabetes mellitus insulin-dependent, Hypertension (Start date included: 30 years ago. There was no recent change in status such as improvement or worsening.), Hypercholesterolemia (Start date included: 30 years ago. There was no recent change in status such as improvement or worsening), who experienced unexpected serious(hospitalization) events of gait inability, dysstasia, hypokinesia, which occurred one day after fourth dose of mRNA-1273 vaccine. The patient noted to have received three doses with COMINARTY unspecified days prior to mRNA-1273 (Interchange of vaccine products). It is reported that patient due to symptoms called ambulance admitted in  emergency, CT was done but it was negative for stroke  and patient spent 3 days at the hospital, and after that the patient was transferred to a rehab facility. The patient remains being treated because symptoms are not improving.  Concurrent medical history included Diabetes mellitus insulin-dependent, Hypertension, Hypercholesterolemia and advancing age remains as confounding for the events. The benefit-risk relationship of mRNA-1273 is not affected by this report.