Arm became progressively sorer throughout the day, and by the evening the entirety of upper arm and part of shoulder were sore to the point of affecting arm's range of motion; Arm became progressively sorer throughout the day, and by the evening the entirety of upper arm and part of shoulder were sore to the point of affecting arm's range of motion; Arm became progressively sorer throughout the day, and by the evening the entirety of upper arm and part of shoulder were sore to the point of affecting arm's range of motion; Developed a fever of about 101F; Chills; Body aches; Migraine; Only slept for two hours that night; Less intense headache; This is a spontaneous report from a contactable consumer, the patient. A 24-year-old non-pregnant female patient received the first dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Lot Number: EW0162) via an unspecified route of administration in the left arm on 14Apr2021 at 12:30 (at the age of 24-year-old) as a single dose for COVID-19 immunisation. Medical history included alpha thalassemia (mild) from unknown date and COVID-19 on an unknown date in late Jan2021. The patient had no known allergies. Prior to the vaccination, the patient was diagnosed with COVID-19. Since the vaccination, the patient had been tested for COVID-19. On 26Mar2021, the patient underwent SARS-CoV-2, NAA  via nasal swab and the result was negative. The patient did not receive any other vaccines within four weeks prior to the vaccination. Concomitant medications were not reported. On 14Apr2021 at 23:00, the patient reported that the night she received the first dose of the Pfizer COVID vaccine, she developed most of the same symptoms she had during the worst night of her COVID infection in late Jan2021. Her arm became progressively sorer throughout the day, and by the evening the entirety of her upper arm and part of her shoulder were sore to the point of affecting her arm's range of motion. She also had developed a fever of about 101 fahrenheit, chills, body aches, and a migraine. She did not had a cough as she did when she had an active case of COVID. She only slept for two hours that night, but she felt much better when morning came. The patient had a low-grade fever throughout the next couple of days and a less intense headache. She was never hospitalized for COVID, but she did have lingering symptom that only dissipated after she received the first dose of the vaccine. Lingering symptoms included low-grade fevers, fatigue, elevated heart rate, loss of smell, and lightheadedness. The patient was fully recovered at the time of the report. The events did not result in doctor or other healthcare professional office/clinic visit, and emergency room/department or urgent care. Therapeutic measures were not taken as a result of the event. The clinical outcome of the events arm became progressively sorer throughout the day, and by the evening the entirety of her upper arm and part of her shoulder were sore to the point of affecting her arm's range of motion, fever of about 101 fahrenheit, chills, body aches, migraine, only slept for two hours that night, and less intense headache were recovered on an unknown date in Apr2021.  No follow-up attempts are needed. No further information is expected.