A positive antigen test result confirmed the infection; A positive antigen test result confirmed the infection; Fever; Sweating; Body aches; Fatigue; I awoke with a slightly sore throat; Headache; Booster dose; Very random coughing/sneezing; Very random coughing/sneezing; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 51 year-old male patient received bnt162b2 (BNT162B2), administration date 21Oct2021 (Lot number: FF8841) at the age of 51 years as dose 3 (booster) single for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Bnt162b2 (Dose: 1, Lot number: EL3248), administration date: 19Jan2021, when the patient was 50 years old, for COVID-19 immunisation; Bnt162b2 (Dose: 2, Lot number: EL3248), administration date: 11Feb2021, when the patient was 50 years old, for COVID-19 immunisation. The following information was reported: VACCINATION FAILURE (medically significant), COVID-19 (medically significant) all with onset 12Dec2021, outcome "unknown" and all described as "A positive antigen test result confirmed the infection"; IMMUNISATION (medically significant) with onset 21Oct2021, outcome "unknown", described as "Booster dose"; SNEEZING (non-serious), COUGH (non-serious) all with onset 2021, outcome "unknown" and all described as "Very random coughing/sneezing"; OROPHARYNGEAL PAIN (non-serious) with onset 11Dec2021, outcome "unknown", described as "I awoke with a slightly sore throat"; HEADACHE (non-serious) with onset 11Dec2021, outcome "unknown", described as "Headache"; PYREXIA (non-serious) with onset 12Dec2021, outcome "unknown", described as "Fever"; HYPERHIDROSIS (non-serious) with onset 12Dec2021, outcome "unknown", described as "Sweating "; PAIN (non-serious) with onset 12Dec2021, outcome "unknown", described as "Body aches"; FATIGUE (non-serious) with onset 12Dec2021, outcome "unknown", described as "Fatigue". The patient underwent the following laboratory tests and procedures: sars-cov-2 test: (04Dec2021) negative; (07Dec2021) negative; (09Dec2021) negative; (11Dec2021) negative; (12Dec2021) positive result. Clinical course: Patient traveled internationally starting on Sunday 05Dec2021 and arrived in (City) around 1700 hours on Monday 06Dec2021. Prior to leaving, a PCR test was taken on Saturday 04Dec2021. The result was negative. See attached Thermo Fisher results. Once arriving at destination, patient traveled to the (Institute name) to conduct equipment testing at (Company name) requires all visitors to be tested on the first day on site, so he administered a nasal swab Antigen self-test on Tuesday 07Dec2021. This test was negative. (Company name) also requires 2 tests per week, so another self-test was taken on Thursday 09Dec2021. This test was also negative. On Friday morning, 10Dec2021, a member of the (Company name) team reported that he tested positive and had symptoms. This prompted (Company name) to have all individuals who had any contact with the team member to take a test. The test on Friday morning was negative. Patient had extremely limited contact with the individual who tested positive during his time at (Company name). On 11Dec2021, Saturday afternoon, patient had a rapid Antigen test taken at a test center in (facility name) to comply with the Regulatory Authority requirement of a negative test result within 4-7 days after arriving. This test was negative. Patient symptoms, sore throat, headache started late on the night of 11Dec2021into the morning of 12Dec2021. After going to bed on Saturday evening, he awoke with a slightly sore throat, by Sunday morning he had a headache and sore throat. His symptoms have progressed to fever (I do not have a thermometer to know my exact temperature) based on sweating, along with body aches and fatigue. Very random coughing/sneezing. Patient took Antigen Self-Test on Sunday morning around 07:00 and this test came back with a positive result. To rule out a false positive he performed a second self-test that also came back positive. Patient was fully vaccinated, including a booster and have been infected with the Covid-19 virus. On 12Dec2021, a positive antigen test result confirmed the infection. Patient was awaiting the results of a PCR test that was taken on Monday, 13DEC2021, at a Doctor's office.   No follow-up attempts are possible. No further information is expected.; Sender's Comments: Linked Report(s) : US-PFIZER INC-202101780993 same reporter/patient/product, different dose/event.