joint pain/still having joint pain and muscle aches in her knees and lower legs; It is mainly irritating; still having joint pain and muscle aches in her knees and lower legs; body aches; a fever for about 3 days; feeling heaviness in her chest; She was chocking it up to anxiety; This is a spontaneous report from the contactable nurses (one is the patient).  A 45-years-old female patient received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection, lot number and expiration date not reported), via an unspecified route of administration, on the right deltoid, on 04Jan2021 at a single dose as she wanted added protection (Covid-19 immunization). The patient medical history was not reported. The patient has no heart issues but has a family history of heart disease. The patient's concomitant medications were not reported.  The patient was asking if it is okay to take second dose after experiencing side effects of fever, body ache, joint pain, probably anxiety, chest heaviness 8-10h after (not wheezing, 98% O2 saturation) which returned next day and subsided. On 04Jan2021, the patient got her first dose of the Pfizer COVID Vaccine, she was one of the lucky people who had joint pain, body aches, and a fever for about 3 days. She noticed about 8-10 hours after she got the vaccine that she started feeling heaviness in her chest, chest felt tight and heavy; not shortness of breath, harder to take a deep breath. She had no wheezing. In Jan2021, her oxygen level was 98%. She was chocking it up to anxiety in Jan2021. It went away. She had it the same day and the next day intermittently. It was short and passing. She is still having joint pain and muscle aches in her knees and lower legs. It is intermittent and mainly at night. She is supposed to get the second dose next Friday and asking should she go ahead and get the second dose. The joint pain had went away intermittently on Tuesday, then hit her harder on Wednesday. Thursday she felt okay but the Friday again was having the pain. It is still occurring. It is mainly at night. In the day she feels okay. It is when she lays down to relax that it kicks in. It is mainly irritating but she would say it is medically significant as it has lasted for a while, almost 2 weeks now and she is still having issues.  She takes 1000mg of acetaminophen (TYLENOL) to knock it out. The heaviness in her chest lasted about 1.5 hours the first day, and then went into Tuesday intermittently. The patient recovered from anxiety in Jan2021, body aches and fever on 07Jan2021, heaviness in her chest recovered on 05Jan2021, while other events were not recovered. The reporter assessed the events of Joint pain and muscle aches in her knees and lower legs, and irritating as medically significant. The reporter causality of the events for joint pain and muscle aches in her knees and lower legs, body aches, fever and heaviness in her chest were related to the suspect drug, causality for other events was not reported.  Information about lot number/batch number was requested.; Sender's Comments: Based on the information currently provided, the vaccination with BNT162B2 might play a contributory role in triggering the onset of events of Joint pain and muscle aches in her knees and lower legs and irritating. The impact of this report on the benefit/risk profile of the Pfizer product is evaluated as part of Pfizer procedures for safety evaluation, including the review and analysis of aggregate data for adverse events. Any safety concern identified as part of this review, as well as any appropriate action in response, will be promptly notified to Regulatory Authorities, Ethics Committees and Investigators, as appropriate.