Diarrhea; her stomach would start gurgling, and then she was off to the bathroom; She said on 26Mar2021 she got sick & she was not feeling good today (29Mar2021); she was not able to eat, clarifying she was afraid to eat; sick; she got real nauseous. She said she felt like she had to throw-up, but couldn't; Chills; the lymph nodes in her left armpit were a little sore the day after her second COVID-19 Vaccine shot (20Mar2021); she had a slight headache later in the evening on the day of her 2nd COVID-19 Vaccine. She said her headache was no big deal; her injection site was bruised, clarifying it was black and blue, but didn't hurt; This is a spontaneous report from a contactable consumer via Pfizer. A 74-year-old female patient (consumer) received bnt162b2 (BNT162B2, formulation: Solution for injection, Batch/Lot Number: EP7534, Vaccination Facility Type was at School), dose 2 via an unspecified route of administration, administered in Arm Left on 19Mar2021 14:00 (Age 74-year-old at the time of vaccination) as DOSE 2, SINGLE for covid-19 immunisation. The medical history included high blood pressure for at least 10 years and took a low dose of unspecified blood pressure medication and she had had sleep apnoea for at least 25 years both from an unknown date and unknown if ongoing. The historical vaccine included Pfizer COVID-19 Vaccine, dose 1, taken via Intramuscular route, dose 1 single on anatomical location of left arm, on 24Feb2021 (Lot Number: EN6205, Expiry Date: Unknown). The concomitant medication incuded apixaban (ELIQUIS) taken for blood thinning, start and stop date were not reported. The patient reported she had both doses of the Pfizer COVID-19 Vaccine. She said she took her first COVID-19 Vaccine shot in Feb2021 (clarified as 24Feb2021), and her second shot on 19Mar2021. She said she had a slight headache later in the evening on the day of her second COVID-19 Vaccine (19Mar2021). She said her headache was no big deal, and she didn't feel that her headache warranted taking a Tylenol, so she went to bed, and woke up the next morning on 20Mar2021, and her headache was gone. She clarified the lymph nodes in her left armpit were a little sore the day after her second COVID-19 Vaccine shot (20Mar2021), and she recovered completely from that. She said a week later all Hell broke loose. She said on 26Mar2021 she got sick. She clarified she got really nauseous. She said she felt like she had to throw-up but couldn't. She said she had the chills really bad but did not have a fever or a headache. She said on 27Mar2021, she was still nauseous. She said she was not able to eat, clarifying she was afraid to eat. She said she had only slight chills on 27Mar2021. She said she didn't think anything could be done for her symptoms, so she laid low and bundled up and stayed on her recliner all day. She said yesterday (28Mar2021) she felt a little better. She said this morning (29Mar2021) she had diarrhoea, and was nauseous, again. She clarified her stomach would start gurgling, and then she was off to the bathroom. Caller said she was 74-year-old and had not been out of her house. She said she lived alone and didn't have any communication with anyone. She clarified she wasn't exposed to anyone who had been sick. Caller asked if what she was experiencing were side effects of the COVID-19 Vaccine, and if it would take her body that long to react to the COVID-19 Vaccine. Caller was advised she would be transferred to Pfizer Medical Information for further assistance with her questions. Reported for her first COVID-19 Vaccine on 24Feb2021, the Pfizer Lot Number was EN6205, and for her second COVID-19 Vaccine on 19Mar2021, the Pfizer Lot Number was EP7534. She said both COVID-19 Vaccine doses did not have a NDC Number or Expiration Date listed on her COVID-19 Vaccination Card. She said she received both COVID-19 Vaccine doses in her left arm. Reported her injection site was bruised, clarifying it was black and blue, but didn't hurt. Reported she didn't take any Tylenol because she was afraid to mess up the COVID-19 Vaccine. No further details provided. Reported she took Eliquis for blood thinning. Reported she figured what she was experiencing was part of the COVID-19 Vaccine shot, and she just needed to wait things out. She said on 26Mar2021 she got sick, and she was not feeling good, again, today on 29Mar2021. She said her stomach would start gurgling, and then she was off to the bathroom. She said her injection site was bruised, saying it was black and blue, but didn't hurt. She said she was not feeling good, again, today (29Mar2021). The outcome of the event her injection site was bruised and clarifying it was black and blue but didn't hurt was reported as unknown. The outcome of the events she got really nauseous. She said she felt like she had to throw-up, but couldn't, Diarrhoea, her stomach would start gurgling, and then she was off to the bathroom was reported as not recovered, while for other events it was reported as recovered.  No follow-up attempts are possible. No further information is expected.