50 hours after injection, I had another ill feeling; Lightheaded; Throbbing headache and was bed ridden the whole next day; Severe cold chills for 4 hours; My body started aching; All of my joints aches like arthritis. My wrists, ankles, knees and hips; Got a heat flash that lasted 3 hours; was sweating and my skin felt like sunburnt; This is a spontaneous report from a contactable other healthcare professional, the patient. A 35-year-old non-pregnant female patient received the second dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Lot Number: EW0162) via an unspecified route of administration in the left arm on 20Apr2021 at 10:00 (at the age of 35-years-old) as a single dose for COVID-19 immunisation. The patient did not have any relevant medical history. The patient had no known allergies to medications, food, or other products. Prior to the vaccination, the patient was not diagnosed with COVID-19. The patient did not receive any other vaccines within four weeks prior to the vaccination. Concomitant medication included ethinylestradiol, norethisterone acetate (JUNEL) for birth control from an unknown date and unknown if ongoing. The patient previously received the first dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Lot number: EP7533) via an unspecified route of administration in the left arm on 30Mar2021, at 11:00 (at the age of 35-years-old) as a single dose for COVID-19 immunisation. It was reported that the patient was fine for about 11 after the vaccine. On 21Apr2021 at 21:00, then the patient got severe cold chills for 4 hours. Her body started aching. All of her joints ached like arthritis. Her wrists, ankles, knees and hips. Then she got a heat flash that lasted 3 hours. She was sweating and her skin felt like sunburnt. She had a throbbing headache and was bed ridden the whole next day on 22Apr2021. It took about 36 hours after the injection to start feeling better. However, on 22Apr2021 at 12:00, 50 hours after injection, she had another ill feeling. Lightheaded and minor aches again. Lasted about an hour. The events did not result in doctor or other healthcare professional office/clinic visit, emergency room/department or urgent care. Therapeutic measures were not taken for the events excluding body started aching. All of her joints ached like arthritis. Her wrists, ankles, knees and hips for which included treatment with ibuprofen (MOTRIN) 19 hours after the injection. Since the vaccination, the patient had not been tested for COVID-19. The clinical outcome of the event severe cold chills for 4 hours was recovered on 22Apr2021 at 01:00. The clinical outcome of the events body started aching, all of her joints ached like arthritis, her wrists, ankles, knees and hips, was sweating and skin felt like sunburnt and throbbing headache and was bed ridden the whole next day was recovered on an unknown date in Apr2021. The clinical outcome of the event got a heat flash that lasted 3 hours was recovered on 22Apr2021 at 00:00. The clinical outcome of the event 50 hours after injection, had another ill feeling and lightheaded was resolved on 22Apr2021 at 13:00.  No follow-up attempts are needed. No further information is expected.