booster dose; headache; Patient walked right past the caller, acting like she didn't recognize her; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team.  A 77 year-old female patient received bnt162b2 (BNT162B2), administration date Oct2021 (Batch/Lot number: unknown) at the age of 77 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "thyroid condition" (unspecified if ongoing). There were no concomitant medications. Vaccination history included: Bnt162b2 (Dose 1, single), for COVID-19 immunization; Bnt162b2 (Dose 2, single), for COVID-19 immunization. The following information was reported: IMMUNISATION (non-serious) with onset Oct2021, outcome "unknown", described as "booster dose"; HEADACHE (non-serious) with onset Oct2021, outcome "not recovered", described as "headache"; FEELING ABNORMAL (non-serious) with onset Oct2021, outcome "unknown", described as "Patient walked right past the caller, acting like she didn't recognize her". Therapeutic measures were taken as a result of headache. Additional information: Patient received her booster, 2-3 weeks before and ever since then, patient was also getting a headache. The patient was taking COVID-19 vaccine (Verbatim): age because patient was elderly. Additional Information for Other Conditions included a low dose, thyroid pill. The reporter unsure of the exact thyroid condition. The day patient took booster shot, patient met reporter, but walked right past the caller. The reporter still feels like patient was in la la land. The patient was having headaches and has never had headaches in her life. The patient was having headaches on a daily basis since she took the COVID-19 Vaccine booster shot. Headaches began immediately after the shot. The patient came straight to meet the reporter for lunch and walked right by the reporter. Patient looked at reporter with a weird look on her face and sat down at a table. The reporter went over to ask whether she was ok. This happened immediately after the shot. Been trying to talk to patient about going to the doctor. Patient was taking Acetaminophen and the Ibuprofen, 3-4 at a time. Reporter will tell patient she should not take much of that medication and to go see a doctor. Acetaminophen and Ibuprofen were treatments for the headache. Headaches began immediately, the same day as the booster dose.  Ongoing and staying the same. Headaches were daily. Patient will take 3-4 of Acetaminophen or Ibuprofen, the headache will slack off, but never goes away. Patient would start hurting and take more pills. The Acetaminophen and Ibuprofen just dulls the headache, never goes away. Patient never had a history of headaches. Patient was a retired nurse. Caller stated it was hard for patient to go get medical attention. Caller believed patient was going to the doctor tomorrow. Patient got her first two doses around back in the spring when it first became available for patient's age group. No new medications.  Only takes a thyroid medication, but caller was not sure if patient was doing that right now.  The only health problem patient has been a thyroid condition. Patient unable to clarify the exact thyroid condition. Patient was active and in great health. Time the vaccination was given was right before lunch time. No additional vaccines were administered on same date of the Pfizer suspect. The events did not require a visit to emergency room or physician Office. Prior Vaccinations (within 4 weeks) and list any other vaccinations within four weeks prior to the first administration date of the suspect vaccine(s) were reported as none. Events following prior vaccinations were reported as none. No relevant tests reported.  The lot number for bnt162b2 was not provided and will be requested during follow up.