vomiting/throwing up; nausea/nauseous; stomach isn't right; stomach upset; This is a spontaneous report from a contactable consumer (parent). A 15-years-old male patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE; Solution for injection; Lot Number: EW0182; expiry unknown), via an unspecified route of administration, administered in Arm Left on 07Jun2021 (at the age of 15-years-old) as DOSE 2, SINGLE for covid-19 immunisation. The patient medical history and concomitant medications (other products) and investigation assessment included none. Patient had no other vaccines on the same day as the suspect product. The patient previously took first dose of BNT162B2 vaccine (Lot number: EW0173; expiry unknown) on 17May2021 (at the age of 15-years-old) for covid-19 immunisation. Patient got the vaccine at a provider's office, but not the patient's doctor, but they are part of the network. Caller believed patient got both doses into left arm but was not entirely sure. The patient experienced vomiting/throwing up, nausea/nauseous, stomach wasn't right, stomach upset on an unspecified date. The patient underwent lab tests and procedures which included blood tests: no cause found for the stomach issues, blood work (investigation): nothing abnormal on unspecified date. Therapeutic measures were taken as a result the reported events. The events were stated as not serious. Patient was vaccinated six or seven weeks ago, had begun nausea and vomiting, doctor visits inconclusive, any advice possible due to vaccine, and reported asked to help. Caller stated that, starting about three weeks ago, the patient's stomach wasn't right, the patient was nauseous and throwing up. Caller stated that they took the patient to a doctor two times, and they did blood tests, and there had been no cause found for the stomach issues. Caller stated that the doctors started patient on Omeprazole which was an anti-acid. Caller stated that patient took that medication for two weeks by the time of this report, and he has had one more follow up event and now he had been scheduled for an ultrasound of his stomach, but he did not have it yet. Caller was wondering if Pfizer had any recommendations and data regarding this side effect of the product. Caller statedthat there was nothing else in-patient history that could cause this, but it had been happening since he got the vaccine. Patient started having stomach issues a couple weeks, maybe two or three weeks after getting his second dose of the product. Caller reported that these events were still ongoing, they had gotten a little bit better, but they were not resolved yet. Caller stated that he was hoping his son's side effects will dissipate. Caller stated patient did have blood work done but it showed nothing abnormal. Caller stated that patient had no other medical history and he never had any history of stomach issues in his 14 years of life. AE(s) did not require a visit to Emergency Room. The caller took patient to a walk-in clinic. If the patient was hospitalized was reported as not applicable. Prior Vaccinations (within 4 weeks); relevant tests included none. Caller asked if he could expect the problem to resolve over a period and stated that blood tests were already done but he thought he would reach out to Pfizer to get this information recorded. Clinical outcome of events was recovering.  Follow-up attempts are completed. No further information is expected.