felt really sick; felt dizzy; shaking; fatigue; headache; sore arm/painful arm; she felt really terrible; how bad she felt with the first that's all; nausea; lethargy; body aches; chills; This is a spontaneous report received from a contactable reporter(s) (Other HCP) from medical information team for a Pfizer sponsored program (005570; 159558).  An 81 year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE), administration date 02Mar2021 (Batch/Lot number: unknown) as dose 1, single for COVID-19 immunisation. Relevant medical history included: "COVID-19", start date: Dec2020 (unspecified if ongoing); "nausea", start date: Dec2020 (unspecified if ongoing); "vomiting", start date: Dec2020 (unspecified if ongoing); "diarrhea", start date: Dec2020 (unspecified if ongoing); "fatigue", start date: Dec2020 (unspecified if ongoing); "tiredness", start date: Dec2020 (unspecified if ongoing); "body aches", start date: Dec2020 (unspecified if ongoing); "headache", start date: Dec2020 (unspecified if ongoing). The patient's concomitant medications were not reported. The following information was reported: ILLNESS (non-serious) with onset Mar2021, outcome "unknown", described as "felt really sick"; DIZZINESS (non-serious) with onset Mar2021, outcome "unknown", described as "felt dizzy"; TREMOR (non-serious) with onset Mar2021, outcome "unknown", described as "shaking"; FATIGUE (non-serious) with onset Mar2021, outcome "unknown", described as "fatigue"; HEADACHE (non-serious) with onset Mar2021, outcome "unknown", described as "headache"; PAIN IN EXTREMITY (non-serious) with onset Mar2021, outcome "unknown", described as "sore arm/painful arm"; MALAISE (non-serious) with onset Mar2021, outcome "unknown", described as "she felt really terrible"; FEELING ABNORMAL (non-serious) with onset Mar2021, outcome "unknown", described as "how bad she felt with the first that's all"; NAUSEA (non-serious) with onset Mar2021, outcome "unknown", described as "nausea"; LETHARGY (non-serious) with onset Mar2021, outcome "unknown", described as "lethargy"; PAIN (non-serious) with onset Mar2021, outcome "unknown", described as "body aches"; CHILLS (non-serious) with onset Mar2021, outcome "unknown", described as "chills".  Additional information: The reporter was a nurse. Clinical course: The patient had received the first dose of the Pfizer COVID-19 vaccine on 02Mar2021 and felt really sick after. She could not get out of bed, felt dizzy, was shaking, had fatigue, headache, nausea, lethargy, body aches, chills and sore arm/painful arm . She felt really terrible, she could not hardly get out of bed for 2 days. Her mother was scheduled to have the second dose of the Pfizer COVID-19 vaccine today 25Mar2021 and she was scared to death to get the vaccine because she might feel ill like when she had the first dose. She did not  have any allergic reaction so it was not an issue with the vaccine itself. The reporter was just more concerned on patient's safety getting another vaccine with how bad she felt with the first that was all.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.; Sender's Comments: Linked Report(s) : US-PFIZER INC-2021334739 Invalid