Off-label use; Booster; Feels a little feverish; This is a spontaneous report from a contactable consumer (patient). This 63-year-old male consumer reported for himself that: A 63-years-old male patient received third dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE mRNA, Solution for injection, Batch/lot number and expiration date was not reported), via an unspecified route of administration on 14Oct2021 (Age at vaccination was 63 years) as DOSE 3 (BOOSTER), SINGLE for covid-19 immunization. Medical history included diabetes mellitus and stage two kidney disease from an unknown date and unknown if ongoing. The patient's concomitant medications were not reported. Previously patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, lot number and expiration date were not reported), via an unspecified route of administration, on unspecified date as DOSE 2, SINGLE and dose 1 of bnt162b2 (lot number and expiration date were not reported) via an unspecified route of administration, on unspecified date as DOSE 1, SINGLE both doses taken for COVID-19 immunization.  On 15Oct2021 after the third (booster) dose of vaccination, the patient experienced feels a little feverish. On an unspecified date patient had booster and off-label use. It was reported that, the patient stated that yesterday, he went to local hospital and had third Pfizer shot.  He was able to get in because he was diabetic even though he was only 63 and not 65, because he has underlying disease.  He stated he was feeling a little feverish.  He came home and was exercising.  Maybe he should not have.  He was about to take a Tylenol.  He would like to know if some people have a fever after getting the third dose, Pfizer COVID Vaccine booster.  He never had a fever with the first two doses.  Unable to confirm if patient was diabetic prior to getting first and second doses of the Pfizer COVID vaccine. As per patient, he stated he came home last night and was exercising and that he shouldn't have exercised with a newly vaccinated arm. He said he thought maybe that's why he has fever. Patient stated that he can deal with fever and that if it's still persistent by Monday, he will be calling his physician. Patient also mentioned he was going take Tylenol for it and mentioned he was diabetic that's why he took the vaccine. Patient also asked how long his symptom might last. Patient asked if his fever might mean he has Covid. Patient also wanted to know the other reported side effects with the vaccine. Caller asked if those that reported side effects with the booster dose recovered from their symptoms. Patient asked if he can still get Covid after getting the booster dose and asked if it's a possible side effect of the vaccine. Patient stated he got the booster shot and had little fever. Now is feeling great. Recovered, test done one time for covid and result was negative. He was diabetic and stage two kidney disease. On an unspecified date the patient underwent lab tests and procedures which included COVID-19 virus test with result negative. The outcome of event feels a little feverish was recovered on an unspecified date in 2021.  No follow-up attempts are Possible. Information on Lot/batch number cannot be obtained. No further information is expected..