A little sore arm; She then developed pneumonia and a urinary infection; She then developed pneumonia and a urinary infection; This is a spontaneous report from a contactable consumer or other non-health care professional. A 77-year-old female patient received bNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Lot number& Expiry date not reported) via unspecified route of administration in arm on 03Jun2021 (at age of 77-year-old) as dose 1, single for COVID-19 Immunization. Patient medical history includes Memory Loss, Breast Cancer, Allergic to Sulfa Medication, Flexeril, Allergic to Clams and Shellfish, Pneumonia, Urinary infection. Patient concomitant medications were not reported. Caller reporting on behalf of his wife who received her first Covid 19 vaccine on 03Jun2021 and she developed pneumonia and a urinary infection. She was prescribed amoxicillin for her infection. The caller wanted to know how the antibiotic will affect his wife. He reports her second Covid 19 vaccine is past due by 2 weeks. He reports his wife gets pneumonia every year and it is not from the Covid 19 vaccine. She received her first Covid 19 vaccine on 03Jun2021 and was due for the second Covid 19 vaccine on 24Jun2021. This is discrepant from the above information that his wife is past due by 2 weeks but is documented as provided by the caller. She will not be able to get the second Covid 19 vaccine until the first week in Jul2021. She waited because she was prescribed a Z-pack for her pneumonia started on 29Jun2021.She developed a urinary infection, she has a history of getting urinary infections too. The doctor also wanted a chest x-ray to make sure that her pneumonia was gone. The Amoxicillin will double check that his wife has no more pneumonia and will clear up her urinary infection. She was hospitalized in 2019 because of a urinary infection. The doctor prescribed Amoxicillin and she cannot wait any longer to get her second Covid 19 vaccine. She must get her second Covid 19 vaccine before time runs out. He reports none of this has to do with the Covid 19 vaccine. These are problems that his wife has had before.Upon follow up when probing for information regarding the sore arm he and his wife experienced he reports the sore arm was minor, it was just where the injection was in jun2021. His wife had breast cancer and can only get injections in one of her arms. It was a little soreness, nothing, barely noticeable. He and his wife did exactly what the pharmacist said, they took a lot of fluids, drank Gatorade for electrolytes. He reports his wife is sleeping right now because she was at the doctor's office this morning. He reports his wife's doctor is being thorough before his wife gets the second Covid 19 vaccine. He is supposed to call the pharmacy to schedule his wife's second Covid 19 vaccine on 03Jul2021. The pharmacist told him not to cancel his wife original appointment because it would remove her from the system. He's will call on 03Jul2021 and hopefully his wife will be able to get her second dose on 05Jul2021 or 06Jul2021. At that time, she'll almost be off the Amoxicillin. He is asking what the effectiveness rate is of receiving the Covid 19 vaccine while on an antibiotic.The pharmacist told him the effectiveness is diminished for people who have taken an antibiotic. He believes the first Covid 19 vaccine provides 70% effectiveness while the second Covid 19 vaccine provides 95% effectiveness. His sister-in-law has titanium plates in her back and must take an antibiotic for the rest of her life and she received the Covid 19 vaccine. Advised in response to caller to discuss with Health care professional about the final decision about receiving the second dose to discuss the risks and benefits of the administration of the vaccine and the HCP is most familiar with the health history of his wife. Pfizer is unable to make treatment recommendations for individual patients. Patient underwent lab test and procedures include Chest X-ray result was it showed nothing, no pneumonia; SARS-CoV-2 test was negative; Urine analysis result was unknown; all tests done on Jun2021. The outcome of event was unknown.   Follow up (29Jun2021): This is a follow up spontaneous report from a Pfizer Sponsored Program. A contactable consumer reported for a 77-year-old female patient (reporter's wife) that: New information include medical history, schedule of second dose, Lab test, event little sore arm, visit of physician office.   No further information is provided or obtained.Information on lot/batch number has been requested.