Could not move/Was unable to be pulled up by his wife/he Was a "dead weight"; Could not even get up to go to the bathroom to go pee; speech was bad/His wife had difficulty understanding him/Voice got back to normal; Breathing got worse; Used walker to get around; Arm was sore; Slight headache; Wicked side effect; This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION COMPLICATION (Wicked side effect), MOBILITY DECREASED (Could not move/Was unable to be pulled up by his wife/he Was a "dead weight"), LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (Could not even get up to go to the bathroom to go pee), DYSARTHRIA (speech was bad/His wife had difficulty understanding him/Voice got back to normal) and DYSPNOEA (Breathing got worse) in an 81-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 066K21A, A939905, 001A21A and 016M20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Patient has never tested positive or diagnosed with COVID-19.  The patient's past medical history included Leukemia (For 6 years (CLL) even before the 1st dose of Moderna vaccine.). Concurrent medical conditions included COPD and Drug allergy (Aleve).   On 06-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 07-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 29-Oct-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 06-Apr-2022, received fourth dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 07-Apr-2022, the patient experienced MOBILITY DECREASED (Could not move/Was unable to be pulled up by his wife/he Was a "dead weight"). In April 2022, the patient experienced VACCINATION COMPLICATION (Wicked side effect), LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (Could not even get up to go to the bathroom to go pee), DYSARTHRIA (speech was bad/His wife had difficulty understanding him/Voice got back to normal), DYSPNOEA (Breathing got worse), WALKING AID USER (Used walker to get around), PAIN IN EXTREMITY (Arm was sore) and HEADACHE (Slight headache). In April 2022, VACCINATION COMPLICATION (Wicked side effect), MOBILITY DECREASED (Could not move/Was unable to be pulled up by his wife/he Was a "dead weight"), LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (Could not even get up to go to the bathroom to go pee), DYSARTHRIA (speech was bad/His wife had difficulty understanding him/Voice got back to normal), DYSPNOEA (Breathing got worse), WALKING AID USER (Used walker to get around), PAIN IN EXTREMITY (Arm was sore) and HEADACHE (Slight headache) had resolved.            No concomitant medication information provided. The patient stated that on a day, he felt better and used walker to get around and by Saturday, Patient did not need the walker and his voice got back to normal and by Sunday, the patient stated that he was fine and felt as if he never even had the booster as he was back to normal. No treatment medication information provided.