experience pain her right knee; her arm bothered her a little bit from the shot; This is a spontaneous report from a contactable consumer (Patient). A 76-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Batch/Lot Number: EP7534, Expiry date was not reported), via an unspecified route of administration on 18Mar2021 11:15 (at the age of 76-years-old) in Arm Right as dose 1, single for COVID-19 immunization. The Patient Medical history included arthritis from an unknown date and unknown if ongoing. Patient history Arthritis in both of her knees (From: Unspecified To: Unspecified) Additional Information for Other Conditions: Five months ago, she was complaining to her doctor about her knees hurting her. Her doctor sent her for X-Rays. She found out she has arthritis in both of her knees. There were no concomitant medications. History of all previous immunization with the Pfizer vaccine was none. Additional Vaccines Administered on Same Date of the Pfizer Suspect was none. The Patient did not used other products. Prior Vaccinations within 4 weeks was none. Caller received her first dose of the pfizer COVID 19 vaccine on 18Mar2021. The first day she was fine, her arm bothered her a little bit from the shot, but that was nothing. She went to bed, and then got up the next morning on 19Mar2021, experience pain her right knee. When she tried to get out of bed, she could hardly stand on her right leg. She read the paper and it listed the side effects as: arm soreness, fatigue, fever/feverishness, chills, body/joint/muscle aches, headache. She assumed it was the joint pain. The joint pain is easing up, but it's still bothering her all this time. Caller wanted to know if this has been reported. She stupidly called the insurance company because she did not know who else to call. The insurance company put her on the phone with a nurse- she doesn't know who the nurse was and where she was from. The nurse told her that she better get to the doctor right away because she did not feel it was a side effect of the vaccine. She does not have a fever, she does not have a headache, she doesn't have anything except this pain in her right knee. Caller stated it is getting better every day. Caller stated she has arthritis in both knees. Caller wanted to know if what she was thinking was true. Possible duplicate AE. She received the COVID shot in her right arm. Caller asks if her right knee hurting is a side effect of the vaccine. Caller wanted to know if she got the first shot in the right arm would she get the second shot in the same arm. Caller thanked agent for being so understanding. The patient taking Pfizer COVID-19 vaccine she felt she should get the COVID-19 vaccine, so she does not get the covid flu. Reporter details: She worked in a hospital as a unit secretary. Primary Healthcare Professional Info: Consent to contact this person Not Provided, no further contact details were known. She mentions she put in a call to her doctors office, before she called Pfizer. All she got was a recording. She confirms her arm bothered her a little bit from the shot, but it was not a big deal. She read that she could put ice on it, but it didn't bother her that bad. Her knee still is hurting her a little bit, but not nearly as bad as what it was. The pain is subsiding. On her patient record card, it says Pfizer and EP7534 below it. She sees also on her card, "healthcare professional or clinic site VL and UMPC. Indication: They have been advertising the covid vaccine and putting it on the news, local and national news. She felt she should get the covid vaccine, so she does not get the covid flu. Her niece got covid, and she followed her symptoms and agony on (social site). She does not want to experience what her niece went through. Her niece was in bed for 3 weeks. The Patient not visited to Emergency Room and Physician Office. The nurse that she talked to with the insurance company told her that she needed to go and see her doctor or go to the emergency room. She told the nurse that she would call her doctor, but she was not going to the emergency room. She put in a call to her doctor, it is done through the computer, she put in a message. She is waiting for her doctor to call her back. The patient underwent lab tests and procedures which included x-ray: arthritis on arthritis in both of her knees. The outcome for the events her arm bothered her a little bit from the shot was recovered on 18Mar2021 and event experience pain her right knee was not recovered.  No follow-up attempts are possible. No further information is expected.