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 89 year-old female patient received bnt162b2 (BNT162B2), administered in arm right, administration date 07Mar2021 19:00 (Lot number: EN6206) at the age of 89 years as dose 1, single for Covid-19 immunisation. The patient had no relevant medical history. The patient took concomitant medications. The following information was reported: DIARRHOEA (non-serious) with onset 08Mar2021 19:00, outcome "recovered" (2021), described as "Diarrhea"; BODY TEMPERATURE INCREASED (non-serious) with onset 08Mar2021 19:00, outcome "recovered" (2021), described as "Elevated temperature of 1 to 1.5 degrees / had a temperature which was not much"; PAIN (non-serious) with onset Mar2021, outcome "unknown", described as "Aches and pains"; BACK PAIN (non-serious) with onset Mar2021, outcome "unknown", described as "Upper left quadrant pain in her back that was increasingly sore"; VACCINATION SITE PAIN (non-serious) with onset Mar2021, outcome "recovered" (2021), described as "Injection site was sore"; MUSCULOSKELETAL DISCOMFORT (non-serious) with onset Mar2021, outcome "unknown", described as "Back discomfort / when she moves she yells in expressing discomfort". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of diarrhoea, body temperature increased, pain, back pain, vaccination site pain, musculoskeletal discomfort. Additional information: Patient reported that she was controlling her side effects with Tylenol. It was reported that due to the events the patient has a few cautions about receiving her second dose of the Pfizer Covid-19 vaccine. Patient wanted to know how to determine if this was a severe reaction and was this something she needed to be concerned about for the second dose which she wanted to have badly but wants to be secure. Clinical course: The patient reported that she received her 1st dose of Pfizer COVID Vaccine on 07Mar2021 and within 24 hours of the shot she had a temperature which was not much but she just knows what her normal temperature is for her and her temperature 24 hours after the vaccine was 1.5 degrees above her normal temperature; states she was running 99 degrees Fahrenheit but was usually down in the 97-98 degree range and has been treating her temperature with Tylenol. Stated the temperature resolved about a day and a half later after it began and she was on Tylenol by that time and Tylenol took care of the temperature. Patient stated the last side effect she has is more intense and occurred the same day as the other reported events and after; she stated the last side effect was the thing that bothered her since her shot was that her left side of her back in the whole upper quadrant of the back was sometimes so sore that when she moves she yells in expressing discomfort. Patient stated she does have to say that when she got the first Pfizer COVID Vaccine, she had been gardening and thought that was what the back discomfort was but the back discomfort continued and was ongoing; stated she was very uncomfortable last night but once she took Tylenol the back discomfort then calmed down so it is relieved with the Tylenol. She stated that she was expecting the injection site to be sore and her injection site was sore but that passed in three days and she expected that to happen so it was no sweat. Patient reported she was functioning and cooking and went for walks and was grateful that this was helping and hoping it was helping and the main things she has a commentary on if she was having some reaction to the Pfizer COVID Vaccine and does not know to what extent she should have the 2nd shot and hoped to get the 2nd shot if it was safe and if it was a cure. She stated that as of "yesterday" being so sore she started looking around and reading this form the facility gave her when they gave the shots and wondered how what she was experiencing applied to the form and what she should do and started looking for answers; she stated she did not know what she should do in terms of the reported events. Patient stated that the main question was and stated she lost her track of mind but the question was that she wanted to make sure she was safe to get the 2nd shot and of course that those around her were secure with her having little bouts of the reported events. The patient had no history of all previous immunization with the Pfizer vaccine considered as suspect. The patient had no prior vaccinations within 4 weeks and no relevant tests. No follow-up attempts are possible. No further information is expected.