I have been diagnosed with, SVT- Super Ventricular Tachycardia; I've had covid 3 times; I have had arm pain. I feel like I know it's the muscles. It's not from the injection itself and the way it was given/ pain in both arms off and on/ throbbing pain; I was miserable. I have felt worse. I have felt worse from having the flu and things like that, or when I had covid the first time, but I have never felt that bad that long.; eyes would burn and red; I had burning in chest; dry cough which was getting worse during that time; All started after first booster 29Nov2021, It swelled, like really big, like I have never seen an injection cause that much swelling and redness and just so sore for about a week on the right side; swelled, like really big, like I have never seen an injection cause that much swelling and redness and just so sore for about a week on the right side; swelling and redness and just so sore for about a week on the right side; long covid; This spontaneous case was reported by a nurse and describes the occurrence of SUPRAVENTRICULAR TACHYCARDIA (I have been diagnosed with, SVT- Super Ventricular Tachycardia), COVID-19 (I've had covid 3 times), PAIN IN EXTREMITY (I have had arm pain. I feel like I know it's the muscles. It's not from the injection itself and the way it was given/ pain in both arms off and on/ throbbing pain), POST-ACUTE COVID-19 SYNDROME (long covid) and FEELING ABNORMAL (I was miserable. I have felt worse. I have felt worse from having the flu and things like that, or when I had covid the first time, but I have never felt that bad that long.) in a 59-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 039F21A, 013A21A and 027B21A) for COVID-19 prophylaxis. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Chronic back pain and Leg pain.   On 07-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 10-Apr-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 29-Nov-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. In January 2022, the patient experienced POST-ACUTE COVID-19 SYNDROME (long covid). On an unknown date, the patient experienced SUPRAVENTRICULAR TACHYCARDIA (I have been diagnosed with, SVT- Super Ventricular Tachycardia), COVID-19 (I've had covid 3 times), PAIN IN EXTREMITY (I have had arm pain. I feel like I know it's the muscles. It's not from the injection itself and the way it was given/ pain in both arms off and on/ throbbing pain), FEELING ABNORMAL (I was miserable. I have felt worse. I have felt worse from having the flu and things like that, or when I had covid the first time, but I have never felt that bad that long.), OCULAR HYPERAEMIA (eyes would burn and red), CHEST PAIN (I had burning in chest), COUGH (dry cough which was getting worse during that time), VACCINATION SITE PAIN (All started after first booster 29Nov2021, It swelled, like really big, like I have never seen an injection cause that much swelling and redness and just so sore for about a week on the right side), VACCINATION SITE SWELLING (swelled, like really big, like I have never seen an injection cause that much swelling and redness and just so sore for about a week on the right side) and VACCINATION SITE ERYTHEMA (swelling and redness and just so sore for about a week on the right side). At the time of the report, SUPRAVENTRICULAR TACHYCARDIA (I have been diagnosed with, SVT- Super Ventricular Tachycardia), FEELING ABNORMAL (I was miserable. I have felt worse. I have felt worse from having the flu and things like that, or when I had covid the first time, but I have never felt that bad that long.), OCULAR HYPERAEMIA (eyes would burn and red), CHEST PAIN (I had burning in chest) and COUGH (dry cough which was getting worse during that time) outcome was unknown, COVID-19 (I've had covid 3 times), POST-ACUTE COVID-19 SYNDROME (long covid), VACCINATION SITE PAIN (All started after first booster 29Nov2021, It swelled, like really big, like I have never seen an injection cause that much swelling and redness and just so sore for about a week on the right side), VACCINATION SITE SWELLING (swelled, like really big, like I have never seen an injection cause that much swelling and redness and just so sore for about a week on the right side) and VACCINATION SITE ERYTHEMA (swelling and redness and just so sore for about a week on the right side) had resolved and PAIN IN EXTREMITY (I have had arm pain. I feel like I know it's the muscles. It's not from the injection itself and the way it was given/ pain in both arms off and on/ throbbing pain) had not resolved.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   Patient had not taken any other boosters because she was afraid. Patient had arm pain, it might go a week without it, and then it might hurt for days. It occurred mostly at night because she was a side sleeper, and it will wake her up at night. Just like a throbbing pain deep in the muscle. At times a few times it has calm down and she thought gone but returns and it was worse on her right arm. She had throbbing pain in the night, worse in right, at times it had come down in the inner arm, it was not red, it swells, and hurts in the inner arm. It woke her up at night and interrupted her sleep. It hurts during the day. It might go for week. It was a form of inflammation. The swelling and redness were just so sore for about a week on the right side. That was very unusual, but it did that. It was reported that with another one's patient had some a little bit, but not like this. Patient as had covid 3 times. All after each injection. Not severe cases, and no hospitalizations, but the first one was worse. She was diagnosed with Long covid mid-Jan-2022 symptoms which lasted about three months. Patient provided the following symptoms associated with long covid diagnosis right arm was hurting, achy, neck pain, flush feeling dizzy nausea, indigestion, chest felt heavy, palpitations, had been diagnosed with, SVT- Super Ventricular Tachycardia since then, and had not stayed in it. It did not last long but thought she was having a few Palpitations before then. She could have had that before but had gotten much worse. She continued stating, anxiety, at times she would get hot and then cold, never felt like she had a fever, fatigue, felt winded, chronic back and leg pain was worse; She would suddenly forget all, she had a constant, raspy and itchy feeling in my throat, kind of low in her throat near her chest. She had a dry cough which was getting worse during that time. She had runny nose.  Concomitant and treatment medication details not reported by the reporter.  Company comment This spontaneous case concerns a 59-year-old female patient with no relevant medical history reported, who experienced the non-serious, unexpected AESI of Supraventricular tachycardia. The patient received the third dose of mRNA-1273. The event onset date was not provided, thus, exact latency between vaccination and onset of the event could not be assessed. It was reported that the patient had swelling, soreness and redness in the right arm where she was vaccinated. She had a throbbing pain in the right arm that waked her up at night and interrupted her sleep. She was diagnosed with Long covid about 1 month after the third dose with symptoms which lasted about three months, which were associated with long covid diagnosis such as right arm was hurting, achy, neck pain, flush feeling dizzy nausea, indigestion, chest felt heavy, palpitations. She had been diagnosed with Supraventricular tachycardia. No further clinical information was provided for medical review. The benefit-risk relationship of mRNA-1273 is not affected by this report.; Sender's Comments: This spontaneous case concerns a 59-year-old female patient with no relevant medical history reported, who experienced the non-serious, unexpected AESI of Supraventricular tachycardia. The patient received the third dose of mRNA-1273. The event onset date was not provided, thus, exact latency between vaccination and onset of the event could not be assessed. It was reported that the patient had swelling, soreness and redness in the right arm where she was vaccinated. She had a throbbing pain in the right arm that waked her up at night and interrupted her sleep. She was diagnosed with Long covid about 1 month after the third dose with symptoms which lasted about three months, which were associated with long covid diagnosis such as right arm was hurting, achy, neck pain, flush feeling dizzy nausea, indigestion, chest felt heavy, palpitations. She had been diagnosed with Supraventricular tachycardia. No further clinical information was provided for medical review. The benefit-risk relationship of mRNA-1273 is not affected by this report.