They tested her body for Covid and she turned up positive and then by the severity of the symptoms and everything they determined she has GI Covid and they put her on the Covid floor; They tested her body for Covid and she turned up positive and then by the severity of the symptoms and everything they determined she has GI Covid and they put her on the Covid floor; She had nausea symptom the whole time and it just progressively got worse; She got dehydrated; Symptoms of nausea, diarrhea she had those GI Covid symptoms; This is a spontaneous report received from a contactable consumer, the Patient's brother. A 54-year-old female patient (Reporter's sister) received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Batch/Lot number: UNKNOWN, expiration date: unknown) via an unspecified route of administration on an unspecified date in Jan2021 as single dose for COVID-19 immunisation. The patient medical history included just two weeks ago, she had ovarian cancer surgery and had a major surgery hysterectomy. The patient previously received her first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Batch/Lot number: UNKNOWN) via an unspecified route of administration on an unspecified date in Dec2020 as single dose for COVID-19 immunisation. Concomitant medications were not reported. It was reported that this was about the Covid vaccine. The patient was a health care provider. She was vaccinated in December and second dose in January.  She was tested for Covid before she went into the hospital and she was negative before the surgery (since not clarified hence not captured). That Wednesday she reported to the yard and hospitalized Monday evening. And this was the readmission post surgery so she was in hospital a week ago, Tuesday she was released. She has been home and she had nausea symptom the whole time and it just progressively got worse and she got dehydrated and got readmitted Monday night. And that was when they tested her for Covid as well just to be admitted in the hospital, they tested her body for Covid and she turned up positive and then by the severity of the symptoms and everything they determined and the doctor of the hospital said she had classic GI Covid symptom and they put her on the Covid floor then (further clarification was unknown hence not checked). They told her the symptoms of it resolved in about 6 days so be through it. She had symptoms of nausea, diarrhoea she had those GI Covid symptoms. And she was now having Covid, she got admitted to the hospital. She had GI Covid and hospitalized. She did not know if this was reported to Pfizer and had just found about this within 24 hours and thought he will. She was with lot medications like antibiotics, pain medications for the surgery and did not know what the medicines are though and had talk to the person in charge of all her medicines. They have been on top of that and have administered everything to her. Other than pre surgical, CBC was checked because of symptoms of nausea, diarrhoea, she had those GI Covid symptoms they tested her to see basic things and all kind of other things and everything was negative. The lab tests included Test: SARS-CoV-2 test, results : positive on an unspecified date; Test : CBC, results: Tested her for see basic things and all kind of other thing and everything was negative on unspecified date. Outcome of all the events were unknown.  Information about Lot/Batch number has been requested.  Other relevant history notes: She had hysterectomy and she was tested for Covid before she went into the hospital and she was negative before the surgery. Antibiotics, she is with lot medication, pain meds for the surgery.