Reported food sickness while on vacation; Has had other episodes of stomach upset that randomly occur such as after flying or in the middle of the night.; Was yesterday bloated; Also a little more sweaty than usual during the day; Had mimosa earlier that made her feel sick to a certain extent; This is a spontaneous report received from contactable reporter(s) (Other HCP and Consumer or other non HCP). Other Case identifier(s): US-PFIZER INC-202101776160 (Pfizer).  A 24 year-old female patient (not pregnant) received bnt162b2 (BNT162B2), administration date 2021 (Batch/Lot number: unknown) at the age of 23 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "Potential Sports Injury" (unspecified if ongoing). The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (Dose Number: 1, Batch/Lot No: Unknown, Not available/provided to reporter at the time of report completion), administration date: Dec2020, when the patient was 23 years old, for Covid-19 Immunization. The following information was reported: ILLNESS (non-serious) with onset Oct2021, outcome "unknown", described as "Reported food sickness while on vacation"; ABDOMINAL DISCOMFORT (non-serious) with onset Oct2021, outcome "unknown", described as "Has had other episodes of stomach upset that randomly occur such as after flying or in the middle of the night."; ABDOMINAL DISTENSION (non-serious) with onset 2021, outcome "unknown", described as "Was yesterday bloated"; HYPERHIDROSIS (non-serious) with onset 2021, outcome "unknown", described as "Also a little more sweaty than usual during the day"; ILLNESS (non-serious) with onset 2021, outcome "unknown", described as "Had mimosa earlier that made her feel sick to a certain extent".  Additional information: This person was vaccinated a long time ago (late 2020 or early 2021). Reported food sickness while on vacation in withheld (vomiting). Has had other episodes of stomach upset that randomly occur such as after flying or in the middle of the night. The patient said that she did not think this was related to vaccine, but she know they have had the Pfizer vaccine. Occurred to her today may need to report - it is delayed but she had completed YRR training. Apparently, symptoms started earlier in the day than known - started at restaurant/bar and extended into night. Individual was vaccinated fully early 2021, likely first dose Dec2020 but unsure exact dates. Issues described above were in Oct2021 and likely unrelated to vaccine. It was reported that the patient was yesterday bloated and had started menstrual cycle because had missed dose of birth control and tried to double up on dose the following day. Also a little more sweaty than usual during the day. Had mimosa earlier that made her feel sick to a certain extent. It was reported that this case was not vaccine related.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.  Follow-up (22Nov2021): This is a follow-up spontaneous report from a contactable consumer. This consumer reported for a 24-year-old patient that: Clinical information added.  Follow-up (02Dec2021): This is a spontaneous follow-up report received from a contactable Consumer. This consumer reported in response to Non-HCP letter via Email address which included that: Updated Information: Primary Reporter Phone number.  Follow-up (13Dec2021): This is a spontaneous follow-up report received from the same contactable consumer. This consumer reported for a 24-year-old female patient that: Updated age at vaccination. Dose Onset date.   Follow-up (11Dec2021): This is a spontaneous follow-up report received from a contactable Nurse. This Nurse reported for a patient that: Added events (abdominal distension, hyperhidrosis and illness).  Follow-up (22Dec2021): This is a follow-up spontaneous report received in response to the mail trail sent regarding the confirmation of mentioned query.   Follow-up (17Jan2022): This follow-up is being submitted to notify that the lot/batch number is not available despite the follow-up attempts made. Follow-up attempts completed. No further information is expected.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.