Dose two: muscle pain; Dose two: joint pain in hips, hands, and knees; 4 weeks after the second shot and she (her friend) still has aches; 4 weeks after the second shot and she (her friend) still has aches and her legs hurt Dose two: severe leg aches; This is a spontaneous report from a contactable consumer. This consumer (patient's friend) reported that an adult female patient received second dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Formulation: Solution for injection, Lot Number was not reported, Expiry date: unknown) via an unspecified route of administration on unspecified date of Feb2021 as a dose 2, single for COVID-19 immunization. The patient medical history and concomitant medications were not reported. The previously took bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE) on an unspecified date for COVID-19 immunization with first dose her friend had severe flu like symptoms for 3 and 1/2 days. She had fever, chills, diarrhea, vomiting, aches, etc. History of all previous immunization with the Pfizer vaccine considered as suspect was reported as, she had the first and second dose of the Covid vaccine. Prior Vaccinations (within 4 weeks) and AE(s) following prior vaccinations were unknown. On an unspecified date after the second dose her friend had severe leg aches, muscle pain, and joint pain in her hips, hands, and knees. Checked for blood clots (Clot retraction) but patient didn't have any (No blood clots) on unspecified date. Reporter saw her friend posted a whole bunch of side effects she had. She may have reported them, she is not sure. She called to report these side effects to Pfizer. Reporter became aware of these side effects yesterday evening 29Apr2021. Reporter did not know a primary physician. It was reported that, this is her first time reporting about the symptoms, and she became aware yesterday. With the first shot her friend had severe flu like symptoms for 3 and 1/2 days. She had fever, chills, diarrhea, vomiting, aches, etc. Reporter clarified that the symptoms listed are the only symptoms she read. Her friend posted on a site called, Did you receive any side effects after receiving the COVID 19 vaccine? which is what caught the reporter's attention. Reporter was sharing all of the information she has. She was looking to see how far back the post goes to see when she received the vaccine. She did not know when any of the symptoms started. After the second dose her friend had severe leg aches, muscle pain, and joint pain in her hips, hands, and knees. They checked for blood clots, and she didn't have any. She has no further information. All reporters knew is what was listed in the post that It said, 4 weeks after the second shot and she (her friend) still has aches and her legs hurt. Reporter was reported because this is nothing reporter has heard before. Reporter expects it was as far back as February, then 7 weeks (dose received). That is everything reporter knows. Her friend posted good things about it, that the vaccine was fine. It was unknown, if any AE(s) require a visit to Emergency Room and/or Physician Office. It was also unknown If the patient was hospitalized, how many days was the hospital stay. Family medical history Relevant to AE was unknown. Reporter seriousness for the events was unspecified. The outcome of events was unknown.  No follow-up attempts are needed; information about lot/batch number cannot be obtained.