not feeling good; she has a lot of stomach discomfort on Sunday the burning stomach sensation got worse, yesterday it got really bad and she was in bed all day and today it's worse; she has a lot of stomach discomfort on Sunday the burning stomach sensation got worse, yesterday it got really bad and she was in bed all day and today it's worse; she has a lot of stomach discomfort on Sunday the burning stomach sensation got worse, yesterday it got really bad and she was in bed all day and today it's worse; Stomach virus; Chills; a lot of gas; Diarrhea; feeling a very burning stomach, warm; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 76 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 18Mar2021 (Lot number: EP7534, Expiration Date: 31Jul2021) at the age of 76 years as dose 1, single for covid-19 immunisation. Relevant medical history included: "Blood pressure high" (unspecified if ongoing), notes: Diagnosis Date: Consumer stated, "It's been a long time.; "High cholesterol" (unspecified if ongoing), notes: Diagnosis Date: Consumer stated, "Its been a long time.". Concomitant medication(s) included: LIPITOR [ATORVASTATIN] taken for blood cholesterol abnormal; DIOVAN taken for hypertension. The following information was reported: CONDITION AGGRAVATED (non-serious) with onset 04Apr2021, outcome "unknown", DYSPEPSIA (non-serious) with onset 01Apr2021, outcome "not recovered" and all described as "feeling a very burning stomach, warm"; ABDOMINAL DISCOMFORT (non-serious), DYSPEPSIA (non-serious) all with onset 04Apr2021, outcome "not recovered" and all described as "she has a lot of stomach discomfort on Sunday the burning stomach sensation got worse, yesterday it got really bad and she was in bed all day and today it's worse"; GASTROENTERITIS VIRAL (non-serious) with onset 04Apr2021, outcome "unknown", described as "Stomach virus"; CHILLS (non-serious) with onset 01Apr2021, outcome "not recovered", described as "Chills"; FLATULENCE (non-serious) with onset 01Apr2021, outcome "not recovered", described as "a lot of gas"; DIARRHOEA (non-serious) with onset 01Apr2021, outcome "not recovered", described as "Diarrhea"; MALAISE (non-serious) with onset 06Apr2021, outcome "not recovered", described as "not feeling good". Therapeutic measures were not taken as a result of condition aggravated, dyspepsia, abdominal discomfort, dyspepsia, gastroenteritis viral, chills, flatulence, diarrhoea, malaise.  Additional information: The patient started feeling a very burning stomach, warm, she has no fever, she has a lot of stomach discomfort on Sunday the burning stomach sensation got worse, yesterday it got really bad and she was in bed all day and today it was worse. Her second dose is scheduled on 08Apr2021 Thursday; she was not sure if she should receive the shot. Consumer stated, she believe "I have a stomach virus it started on Sunday. I am feeling very warm and I get chills, I had very burning stomach and a lot of gas and I am going to the bathroom often and now today, I have total diarrhea and I am afraid to go for second shot on Thursday because I am already having these symptoms. I believed I have some type of the stomach virus already. These symptoms started 2 weeks after the initial shot because I did fine until Thursday, my stomach started burning and it continued on and then yesterday it was entire day with very burning stomach and today I am not feeling good again. I will say these symptoms started on 01Apr2021."  No follow-up attempts are possible. No further information is expected.