stomach flu; Temp. was 98.7 - 99.1 degrees/temp was 100.2; hyperactive bowel sounds; watery stools(3X); unwell/feeling unwell; stomachache; lowgrade fever (99.5 degrees); vomited; exposed to someone with positive COVID-19; This is a spontaneous report received from a contactable reporter(s) (Physician). The reporter is the parent.  A 8 year-old male patient received bnt162b2 (BNT162B2), intramuscular, administered in arm left, administration date 20Nov2021 14:00 (Lot number: FK127) at the age of 8 years as dose 1, single for covid-19 immunisation. Relevant medical history included: "Autism spectrum disorder (Non-verbal)" (unspecified if ongoing); "cashew, macadamia, hazelnut tree nuts" (unspecified if ongoing), notes: Know allergies: food: cashew, macadamia, hazelnut tree nuts; "cat and dog allergy" (unspecified if ongoing), notes: Know allergies: Cat and dog allergy; "seasonal" (unspecified if ongoing). The patient took concomitant medications. Past drug history included: Amoxicillin, reaction(s): "Allergic to amoxicillin", notes: Known allergies: allergic to amoxicillin. The following information was reported: EXPOSURE TO SARS-COV-2 (non-serious) with onset 03Dec2021, outcome "recovering", described as "exposed to someone with positive COVID-19"; MALAISE (non-serious) with onset 03Dec2021 18:00, outcome "recovering", described as "unwell/feeling unwell"; ABDOMINAL PAIN UPPER (non-serious) with onset 03Dec2021 18:00, outcome "recovering", described as "stomachache"; PYREXIA (non-serious) with onset 03Dec2021 18:00, outcome "recovering", described as "lowgrade fever (99.5 degrees)"; VOMITING (non-serious) with onset 03Dec2021 18:00, outcome "recovering", described as "vomited"; DIARRHOEA (non-serious) with onset 05Dec2021, outcome "recovering", described as "watery stools(3X)"; GASTROENTERITIS VIRAL (non-serious) with onset 06Dec2021, outcome "recovering", described as "stomach flu"; BODY TEMPERATURE INCREASED (non-serious) with onset 06Dec2021, outcome "recovering", described as "Temp. was 98.7 - 99.1 degrees/temp was 100.2"; GASTROINTESTINAL SOUNDS ABNORMAL (non-serious) with onset 06Dec2021, outcome "recovering", described as "hyperactive bowel sounds". The events "exposed to someone with positive covid-19", "unwell/feeling unwell", "stomachache", "lowgrade fever (99.5 degrees)", "vomited", "watery stools(3x)", "stomach flu", "temp. was 98.7 - 99.1 degrees/temp was 100.2" and "hyperactive bowel sounds" were evaluated at the physician office visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of malaise, abdominal pain upper, pyrexia, vomiting, diarrhoea, gastroenteritis viral, body temperature increased, gastrointestinal sounds abnormal.  Additional information: The patient did not receive any other vaccines within four weeks prior to the vaccination. Patient received multivitamins within 2 weeks of vaccination. Prior to the vaccination, the patient was not diagnosed with COVID-19. Since the vaccination, the patient had been tested for COVID-19. Patient received Pedialyte for hydration and tylenol for fever as needed. The second dose for COVID-19 Vaccination is scheduled for 11Dec.   No follow-up attempts are possible. No further information is expected.