She is better today and is weak; could not eat anything; felt discomfort on right side.; She did not feel good; Just really felt sick; could not eat anything...Prior to that nothing stayed down.; Low grade fever; threw up; Diarrhea; Nausea; Right side of body sore; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 73-year-old female patient received BNT162b2, BNT162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), on 11Jan2023 at 11:30 as dose 4 (booster), single (Lot number: GL0446) at the age of 73 years, in right arm for covid-19 immunisation. The patient's relevant medical history included: "Lyme infection", start date: 2020 (unspecified if ongoing); "mild stroke", start date: 2020 (unspecified if ongoing); "cellulitis", start date: 2020 (unspecified if ongoing), notes: cellulitis set in. They put her on antibiotics for cellulitis and Lyme.; "Antibiotic allergy" (unspecified if ongoing), notes: She did not provide any details about what antibiotics she is allergic to; "AFIB" (unspecified if ongoing), notes: She was in AFIB, so they sent her to the hospital; "Cough" (unspecified if ongoing); "Sinus" (unspecified if ongoing); "congestion" (unspecified if ongoing). Concomitant medication(s) included: CORICIDIN HBP COUGH & COLD taken for cough, sinus disorder, nasal congestion; ATENOLOL taken for cerebrovascular accident. Vaccination history included: BNT162b2 (DOSE 3 (BOOSTER), SINGLE of Pfizer COVID 19 vaccine given on 03Jan2022, Lot FL3198, Exp is unknown. Injected in right arm.), administration date: 03Jan2022, when the patient was 72-year-old, for COVID-19 immunization; BNT162b2 (DOSE 2, SINGLE of Pfizer COVID 19 vaccine given on 08Apr2021, Lot ER8734, expiration is unknown. Given on right arm and had no problem. Injected in right arm.), administration date: 08Apr2021, when the patient was 71-year-old, for COVID-19 immunization; BNT162b2 (DOSE 1, SINGLE Lot EN6306 Injected in left arm), administration date: 18Mar2021, when the patient was 71-year-old, for COVID-19 immunization, reaction(s): "she could feel it on left side of chest", "Had Lymph node swelling". The following information was reported: DIARRHOEA (non-serious) with onset 14Jan2023, outcome "recovering", described as "Diarrhea"; PYREXIA (non-serious) with onset 14Jan2023, outcome "recovering", described as "Low grade fever"; NAUSEA (non-serious) with onset 14Jan2023, outcome "recovering"; PAIN (non-serious) with onset 14Jan2023, outcome "recovering", described as "Right side of body sore"; FOOD INTOLERANCE (non-serious) with onset 14Jan2023, outcome "unknown", described as "could not eat anything...Prior to that nothing stayed down."; VOMITING (non-serious) with onset 14Jan2023, outcome "recovering", described as "threw up"; MALAISE (non-serious) with onset 14Jan2023 at 12:56, outcome "recovering", described as "Just really felt sick"; FEELING ABNORMAL (non-serious) with onset 14Jan2023 at 13:05, outcome "unknown", described as "She did not feel good"; DISCOMFORT (non-serious) with onset 14Jan2023 at 13:07, outcome "unknown", described as "felt discomfort on right side."; EATING DISORDER (non-serious) with onset 14Jan2023 at 13:36, outcome "unknown", described as "could not eat anything"; ASTHENIA (non-serious) with onset 16Jan2023 at 13:01, outcome "unknown", described as "She is better today and is weak". Relevant laboratory tests and procedures are available in the appropriate section.  Additional information:  Additional Information for Other medicines Corcidian HBP: Almost totally gone when she got vaccine, but she continued since she still had a cough. Received call from consumer. She had the Pfizer BioNtech COVID 19 vaccine booster Bivalent - 4th dose on this past Wednesday(11Jan2023). Saturday (14Jan2023) morning, she got up and was nauseous, threw up and could not eat anything. Low grade fever, very low grade and also had it on right arm. Right side was sore. Just really felt sick. Better today (16Jan2023). Wanted to report this and also she had Diarrhea. The patient weight reported as 150-155lbs. Have not eaten for 3 days and not gotten on the scale. Her daughter looked it up and everything she has is listed as a side effect. She is better today and is weak. She did have toast and egg and it stayed down.  Kept trying to push liquid and would have to take it in small amounts or else she would throw up. Had breakfast that morning on Saturday, and by about 10 am it hit her. She did not feel good and felt discomfort on right side. Throwing up- Last night finally got through the night and did not throw up. Drank water and Pedialyte and it stayed down. Had 1 cracker and it stayed down. Prior to that nothing stayed down. When she had first Pfizer BioNtech COVID 19 Vaccine, she had it on the left side. Had Lymph node swelling and pain there and that lasted about 4-5 days. The 2nd and 3rd booster had no side effects at all. She can't remember exact dates because it was so long ago. She later found her card and was able to confirm dates. When she got boosters she did it in the right arm because she did not want to go through it again. Called family doctor and said just to watch it. She could feel it on left side of chest, but it did improve and it did not get any worse, so she did not need to go to the emergency room. She could feel right side soreness was gone. The patient said she had a Lyme infection and mild stroke with no aftereffects. She first stated she could not remember if it was before or after the 1st dose, but later stated she was pretty sure it was before and it occurred in 2020. They put her on atenolol to prevent another stroke. Not sure what it was from and then decided all of the problems was from the Lyme infection. She recovered completely. She was hospitalized 23 Jul of that year. She got a bite and thought it was a mosquito bite and it got really awful looking on back of leg and cellulitis set in. Went to doctor to see about it. She was in AFIB, so they sent her to the hospital, plus she is allergic to a lot of antibiotics and they wanted to monitor her. She did not provide any details about what antibiotics she is allergic to. They put her on antibiotics for cellulitis and Lyme. They tested her and guessed over a period of 3-4 days. First came back negative, 2nd positive and 3rd negative. They assumed she did not have Lyme and only took the antibiotic for 8 days and then off of it. Then in September of that year, got a repeat test and said to take a repeat, actually it was end of August, got a repeat because some times it wont show up as positive for 3-4 weeks. It was labor day that year and she was packing to go visit daughter and her son said she sounded funny. She did not feel funny. Went into hospital and that is when they said she had the stroke. Also hospitalized for that for 3 days. It was labor day and she believes it was 2020, prior to the vaccines. Outcome Lyme: Took antibiotic for a month and then the doctor said she was good. She has not had any reoccurrences. AFIB: Was on the monitors and she had been on them 4-5 times while in the hospital and 2-3 times afterwards and never occurred again. They think it was from the infection. She has always been pretty healthy. The patient had no medical treatment. She was going to go to the doctor today (16Jan2023) if she did not feel better, so she does and did not need to. Since her daughter researched the symptoms and they were all there, they figured it was from the vaccine. When queried about event she could feel it on left side of chest it was confirmed that she was referring to the first dose.