lightheaded; shortness of breath when climbing up the stairs; now they find out when she has shortness of breath her heart skips a beat; she can't do daily activities one day; fell; Insomnia; tired more easily; Headache; Dizziness; weakness of her legs; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from product quality group for a Pfizer sponsored program (159558). The reporter is the patient.  A 65 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 17Dec2021 (Lot number: FD7218) at the age of 65 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "high blood pressure" (unspecified if ongoing); "Fatty liver" (unspecified if ongoing); "allergy" (unspecified if ongoing). Concomitant medication(s) included: AMLODIPINE taken for hypertension; ROSUVASTATIN taken for hepatic steatosis; LEVOCETIRIZINE taken for hypersensitivity. Vaccination history included: Bnt162b2 (Dose: 1, Lot number: EP7534, Location: Left arm), administration date: 20Mar2021, when the patient was 64 years old, for COVID-19 Immunization; Bnt162b2 (Dose:2, Lot number: ER8731, Location: Left arm, she got really sick), administration date: 10Apr2021, when the patient was 64 years old, for COVID-19 Immunization, reaction(s): "sick", "shaking inside", "feeling cold/felt so cold", "Whole body was aching", "nauseous", "dizzy", "slept in bed all day", "feel warm", "bad headache", "low temperature". The following information was reported: DIZZINESS (hospitalization) with onset Jan2022, outcome "recovered" (18Jan2022), described as "lightheaded"; DYSPNOEA (non-serious), outcome "recovering", described as "shortness of breath when climbing up the stairs"; EXTRASYSTOLES (non-serious), outcome "unknown", described as "now they find out when she has shortness of breath her heart skips a beat"; LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (non-serious), outcome "unknown", described as "she can't do daily activities one day"; DIZZINESS (non-serious) with onset Jan2022, outcome "unknown", described as "Dizziness"; MUSCULAR WEAKNESS (non-serious) with onset Jan2022, outcome "recovering", described as "weakness of her legs"; FALL (non-serious), outcome "unknown", described as "fell"; INSOMNIA (non-serious), outcome "unknown", described as "Insomnia"; FATIGUE (non-serious), outcome "not recovered", described as "tired more easily"; HEADACHE (non-serious), outcome "not recovered", described as "Headache". The patient was hospitalized for dizziness (start date: Jan2022). The event "shortness of breath when climbing up the stairs" was evaluated at the emergency room visit. The patient underwent the following laboratory tests and procedures: blood immunoglobulin g: negative, notes: blood test; blood immunoglobulin m: positive, notes: blood test; computerised tomogram: no signs of pneumonia or embolism. Therapeutic measures were not taken as a result of dizziness, dizziness, muscular weakness, fatigue, headache. Therapeutic measures were taken as a result of dyspnoea. Clinical course: Patient had the COVID-19 booster on 17Dec2021, after the booster shot her reaction was not as severe as after the second shot and cannot remember how many days later after the COVID-19 booster dose she developed shortness of breath, when climbing up the stairs and the shortness of breath gradually builds up more and more and it then it was getting severe until Jan2022 when she went to the Emergency Room. Doctor said she may have had a very mild case of COVID-19 since she never felt sick with covid. Patient reports an acute reaction from the COVID-19 booster, her body is telling her something went wrong after her COVID-19 booster vaccine on 17Dec2021 and shortness of breath began a few days later and was gradually getting heavier and heavier and was getting more severe and shortness of breath was going on persistently and gradually and then it worsened and then this week she started feeling better. Patient states when she lays on the table she gets lightheaded and dizziness as well as, headaches and insomnia, insomnia is not consistent. She reports when her body wants to catch some sleep, she is able to sleep. Patient reports in Jan2022, when trying to turn the steering wheel, she got short of breath, due to her lungs. Patient states this is weakness of her legs, Now its improving but she gets tired easily. Lightheaded began the first 2 weeks in Jan2022 up to the 18Jan2022 when she was admitted to the hospital. frequency of headaches and the headaches started a few days ago, headaches are ongoing and come along periodically. Headaches are not worsening but maybe persisting. Dizziness began the beginning of Jan2022, dizziness could come back and then goes away. Patient reports that the dizziness does not bother her as the dizziness comes back and then goes away quickly. Patient states that lack of exercise may have caused her to be tired more easily. Weakness of legs started sometime in Jan2022 before she went to the emergency room. Regarding Treatment for Shortness of Breath patient reports diclofenac didn't help, the doctors couldn't find out anything and that she must have inflammation in her body, they found IgM was positive and she was placed on prednisone and that didn't help and albuterol sulfate inhalation aerosol 90mcg 2 puffs every 4 hours as needed and the inhaler didn't help, patient was also prescribed budesonide formoterol fumarate dihydrate inhalation aerosol 160/4.5mcg 2 puffs 2 times a day. Patient reports no treatment for the lightheadedness, headache, dizziness, tired more easily, or weakness of legs. Patient reports now they find out when she has shortness of breath her heart skips a beat. patient repots shortness of breath got so severe and she climbed a few steps from her garage to her house and was out of breath. Pharmacy was Vaccination Facility Type. No vaccinations within four weeks prior to the first administration date of the suspect vaccine. Patient reports her first shingles shot last Jan2021 she had an adverse event. Blood work for her IgM was how they told her she was positive for the COVID-19 virus and she doesn't know when she had it.  No follow-up attempts are possible. No further information is expected.