serum sickness; Red swelling around the ankles and shin; Red swelling around the ankles and shin; a general kind of feeling ill; a lot of weakness; muscles aches and pain in his joints; He has a definite redness on both of his ankles between the calf and the ankles; He has a lot of pain in the left ankle and is usually its worse at night if on feet all day; He has a lot of pain in the left ankle and is usually its worse at night if on feet all day; He has a lot of pain in the left ankle and is usually its worse at night if on feet all day; the skin on his back was sensitive to touch; muscles aches and pain in his joints; chills; fatigue; This is a spontaneous report from a contactable consumer (patient). A 52-year-old male patient received first dose of BNT162B2 (PFIZER-BIONTEC COVID-19 mRNA VACCINE, Solution for injection, lot number: EN6205 and expiry date was not reported), via an unspecified route of administration, in Arm Left, on 07Mar2021 at 14:30 PM (age at vaccination: 52 years), as a single dose for COVID-19 immunization. The patient's medical history and concomitant medications were not reported. Historical vaccine included Flu shot in Sep2020 for immunization. Past drug included Zofran (was given Zofran once 3 years ago in the hospital for food poisoning via IV for anti-nausea. His vein started turning purple or blue. Has no Lot number or Expiry date) and was allergic. The patient stated that on an unspecified date, he was diagnosed with serum sickness due to vaccine. He was scheduled to take his second dose 5-6 days later, asking if he should take the second dose of the vaccine. The patient wanted to report he still had some allergic reactions to the Pfizer Covid vaccine. He was nervous about getting the second shot. His second shot was scheduled for 28Mar2021. He had a friend who was a doctor who also consulted an Infectious Disease doctor at a hospital who said that he had serum sickness. The patient explained he hadn't seen his provider for his symptoms because his doctor friend said he didn't need to go to the doctor yet unless he had numbness in the feet, but he said it should pass hopefully. The first two days after the shot he felt completely fine and continued to workout and all of that stuff. Then, his symptoms started with a general kind of feeling ill, chills, fatigue on 10Mar2021, and a lot of weakness on the third day after the shot. Then he got muscles aches and pain in his joints, like really bad. He felt like he was getting shingles, however he didn't develop them, but the skin on his back was sensitive to touch. Now, he was having swelling around his ankles, clarified as above his ankles- from his ankle bone to about 5-6 inches up towards the bottom of his calves on both legs. He has a definite redness on both of his ankles between the calf and the ankles. It's all around both legs. He had a lot of pain in the left ankle and was usually its worse at night if on feet all day. He no longer had the chills, and he was getting better with the fatigue, but the "leg thing" was kind of scaring him. Almost all of the very first symptoms except for the swelling and redness in shin/ankle area, came on at once on the third day after the vaccine- chills, fatigue, muscle aches, skin sensitivity came on the third day and persisted until maybe 4 or 5 days ago. They were getting better but now his ankles gone away. His joints still hurt and the muscles were getting better. The fatigue was getting better. His knees and ankle joints were painful. He had redness and swelling around the ankles and shins. He stated it's not a rash because it's not prickly, but it's like red swelling around his ankles/shin area. The patient clarified he previously reported all adverse events he mentioned except his ankles and the serum sickness. He found out about serum sickness yesterday because it was really bothering him. He explained he has only taken Tylenol (Lot: PDC207, Expiration date: Feb2023) to help with the pain. Tylenol, 500mg per caplet; he took 2 pills last night to help with the pain. He has taken the Tylenol off and on; he has probably taken 3 or 4 times since onset of his symptoms. Adverse events did not require a visit to emergency room and physician office. There was a product complaint to report. Outcome of the event chills was recovered on an unspecified date, fatigue and muscles aches and pain in his joints was recovering, and for all other events, it was unknown.  No follow-up attempts are possible. No further information is expected.