adverse effect was pretty severe; muscle problems 12 hours after the booster dose; the pain went to the base of her skull as well; she could not move her neck up or down, right or left; She could not lay head back and touch chin to chest; breathing was difficult because it hurt to move (it was not a breathing problem more of a movement problem); more of a movement problem; she could not drive for 4 days; pain at the injection site (similar to the 1st and 2nd doses); intense muscle pain from her shoulder to the middle of her back; This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION COMPLICATION (adverse effect was pretty severe), MUSCLE DISORDER (muscle problems 12 hours after the booster dose), PAIN (the pain went to the base of her skull as well), MUSCULOSKELETAL DISCOMFORT (she could not move her neck up or down, right or left) and HEAD DISCOMFORT (She could not lay head back and touch chin to chest) in a 31-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 032H21A, 020B21A and 2001A21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.   On 26-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 26-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 17-Dec-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. In December 2021, the patient experienced VACCINATION COMPLICATION (adverse effect was pretty severe), MUSCLE DISORDER (muscle problems 12 hours after the booster dose), PAIN (the pain went to the base of her skull as well), MUSCULOSKELETAL DISCOMFORT (she could not move her neck up or down, right or left), HEAD DISCOMFORT (She could not lay head back and touch chin to chest), DYSPNOEA (breathing was difficult because it hurt to move (it was not a breathing problem more of a movement problem)), MOVEMENT DISORDER (more of a movement problem), LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (she could not drive for 4 days), VACCINATION SITE PAIN (pain at the injection site (similar to the 1st and 2nd doses)) and MYALGIA (intense muscle pain from her shoulder to the middle of her back). The patient was treated with IBUPROFEN ongoing since an unknown date for Adverse event, at an unspecified dose and frequency and PARACETAMOL (TYLENOL [PARACETAMOL]) ongoing since an unknown date for Adverse event, at an unspecified dose and frequency. On 21-Dec-2021, VACCINATION COMPLICATION (adverse effect was pretty severe), MUSCLE DISORDER (muscle problems 12 hours after the booster dose), PAIN (the pain went to the base of her skull as well), MUSCULOSKELETAL DISCOMFORT (she could not move her neck up or down, right or left), HEAD DISCOMFORT (She could not lay head back and touch chin to chest), DYSPNOEA (breathing was difficult because it hurt to move (it was not a breathing problem more of a movement problem)), MOVEMENT DISORDER (more of a movement problem), LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (she could not drive for 4 days), VACCINATION SITE PAIN (pain at the injection site (similar to the 1st and 2nd doses)) and MYALGIA (intense muscle pain from her shoulder to the middle of her back) had resolved.            Concomitant medication of the patient was not reported.  On 21-Dec-2021, when the patient woke up, it was gone and it was so weird because it was like it never happened. The patient called the health department, but it was already resolving. She took Ibuprofen and Tylenol on rotate to manage the pain.   This case was linked to MOD-2021-422951, MOD-2021-426103 (Patient Link).