she started to get very sick, which continued to worsen until nowwhen she feels like she is improving; had stomach and abdominal pains; had stomach and abdominal pains/stomach is still very sensitive; loose stool; she was very tired; Pain or little discomfort in the arm she received the injection; Pain or little discomfort in the arm she received the injection; This is a spontaneous report from a contactable consumer (Patient). A 80-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, EH9896), via an unspecified route of administration to very top of right arm on 22Dec2020 at single dose for covid-19 immunization. It was the first dose. The COVID-19 vaccine was administered at Hospital. Medical history included glaucoma she had drops to take for, mostly she just has problem with her joints and her back with her age. She did not have any diseases or anything; she was not diabetic, nothing like that. There were no concomitant medications. She was administered her first dose of COVID-19 Vaccine on 22Dec2020. She reported that the pain or little discomfort she had in the arm she received the injection in disappeared by 25Dec2020. But on 24Dec2020 she started to get very sick, which continued to worsen until now when she felt like she was improving. She did not know if these events could have something to do with the COVID-19 Vaccine. Pain or little discomfort in the arm she received the injection: Right arm. Everyone warned her that the site would hurt, so she was really glad when it totally went away on 25Dec2020 and thought that it was over; any issues from the injection. Very sick: this event started to get bad on 24Dec2020, she was very tired and not very hungry, she had stomach and abdominal pains and loose stool; 25Dec2020 those symptoms were  worse. It was Christmas so she cooked and thought at first maybe she got carried away baking pies; because that evening she started to have pain and did not each much. 26Dec2020 it was worse; she said she was going to work on 27Dec2020; it was terrible because she was stuck for 12 hours trying to work while very sick. She called off of work 28Dec2020 and 29Dec2020. Since then she has stayed home and still has pain but she took her ranitidine delayed release 100mg twice daily as needed for stomach pain as given to her by her doctor, and is now down to just once daily. She did not know what she would have done without the ranitidine. She did not have any more abdominal pain, but her stomach was still very sensitive. She was tired but thought she was going to be ok. She was scared to get the second scheduled dose of COVID-19 Vaccine because she thought the side effects will be more severe with the booster shot. She just needed to rest and stay home which she has been doing. She has not had any fever. She has not notified her family doctor of these events. There was nothing she did on Christmas that she could think of other than she drank a glass of champagne because she did not know her stomach was going to be so bad. The outcome of the events Pain or little discomfort in the arm she received the injection was recovered on 25Dec2020, the outcome of event sickness was recovering, the outcome of the event Abdominal pain was recovered on an unknown date in Dec2020, the outcome of event stomach pain was not recovered, the outcome of the other events was unknown.