Gets cold very easy; Out of breath; Strep through body; Swelled all over body/left foot still swollen; Weak; Paralyzed for over two weeks; Possible A-fib; Arthritis aggravated; Face was swollen; Hands were swollen; Not feeling well; This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of PARALYSIS (Paralyzed for over two weeks), FEELING COLD (Gets cold very easy), DYSPNOEA (Out of breath), STREPTOCOCCAL INFECTION (Strep through body), SWELLING (Swelled all over body/left foot still swollen), ASTHENIA (Weak) and ATRIAL FIBRILLATION (Possible A-fib) in an 83-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 025A21A and 025A21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Arthritis and Cane user. Concomitant products included HYDROCHLOROTHIAZIDE, FINASTERIDE, OLMESARTAN, SIMVASTATIN, OMEPRAZOLE MAGNESIUM (PRILOSEC [OMEPRAZOLE MAGNESIUM]), COLECALCIFEROL (VITAMIN D [COLECALCIFEROL]) and PARACETAMOL (TYLENOL) for an unknown indication.   On 03-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 31-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 31-Mar-2021, the patient experienced MALAISE (Not feeling well). On 04-Apr-2021,  after starting mRNA-1273 (Moderna COVID-19 Vaccine), the patient experienced ARTHRITIS (Arthritis aggravated), SWELLING FACE (Face was swollen) and PERIPHERAL SWELLING (Hands were swollen). On an unknown date, the patient experienced PARALYSIS (Paralyzed for over two weeks) (seriousness criteria hospitalization and medically significant), FEELING COLD (Gets cold very easy) (seriousness criterion hospitalization), DYSPNOEA (Out of breath) (seriousness criterion hospitalization), STREPTOCOCCAL INFECTION (Strep through body) (seriousness criterion hospitalization), SWELLING (Swelled all over body/left foot still swollen) (seriousness criterion hospitalization), ASTHENIA (Weak) (seriousness criterion hospitalization) and ATRIAL FIBRILLATION (Possible A-fib) (seriousness criterion medically significant). The patient was hospitalized for 34 days due to PARALYSIS, then for 36 days due to ASTHENIA, DYSPNOEA, FEELING COLD, STREPTOCOCCAL INFECTION and SWELLING. The patient was treated with MORPHINE in April 2021 at an unspecified dose and frequency and Physical therapy for Paralysis. At the time of the report, PARALYSIS (Paralyzed for over two weeks) had resolved and FEELING COLD (Gets cold very easy), DYSPNOEA (Out of breath), STREPTOCOCCAL INFECTION (Strep through body), SWELLING (Swelled all over body/left foot still swollen), ASTHENIA (Weak), ATRIAL FIBRILLATION (Possible A-fib), ARTHRITIS (Arthritis aggravated), MALAISE (Not feeling well), SWELLING FACE (Face was swollen) and PERIPHERAL SWELLING (Hands were swollen) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 04-Apr-2021, Hepatic enzyme: elevated (High) Patient experienced elevated liver enzymes.. In 2021, Heart rate: high (High) Heart rate- increased possible a Fib.         Concomitant medication also includes an unspecified blood thinner.  Patient was prescribed with Tramadol which was provided at discharge.  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.  However, patient's hx of arthritis and being a cane user are confounding factors that may play a possible contributory role providing an alternative explanation.  FU1 received additional serious AEs after second dose does not change company comment. Further information has been requested.   This case was linked to US-MODERNATX, INC.-MOD-2021-067304, US-MODERNATX, INC.-MOD-2021-067204 (E2B Linked Report).   Most recent FOLLOW-UP information incorporated above includes: On 07-Jun-2021: Follow up received on 07-JUN-2021, upgraded case to serious with  the addition of event paralysis and hospitalization.; 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.  However, patient's hx of arthritis and being a cane user are confounding factors that may play a possible contributory role providing an alternative explanation.  FU1 received additional serious AEs after second dose does not change company comment. Further information has been requested. US-MODERNATX, INC.-MOD-2021-067304:First dose case US-MODERNATX, INC.-MOD-2021-067204:Crosslinked (family member)