bladder infection; when she took her first dose she was tired afterwards but now she is tired before she even begins with the shot; already has other aches and pains; This is a spontaneous report from a contactable consumer (patient). A 101-year-old female patient received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE), via an unspecified route of administration on an unspecified date at single dose for COVID-19 immunisation at an unknown age. The patient medical history and concomitant medications were not reported.  The patient had bladder infection, and when she took her first dose she was tired afterwards but now she is tired before she even begins with the shot, and already has other aches and pains. The outcome of the events was unknown. Clinical course: Caller is a 101-year old, Female and her first dose of the PFIZER-BIONTECH COVID-19 VACCINE. Following her first dose, she developed a bladder infection and was on sulfa antibiotic (did not provide the specific drug name) until Saturday. Caller was set to have her second dose tomorrow and she read that side effects following the second dose may be more intense the first one and would like to know if it is okay for her to get the second dose of the vaccine considering the side effect she experienced and the drug she just took. Also, caller was not able to provide prescribing physician's information as she explicitly mentioned that she was healthy and did not frequently go to the doctor, not when it was needed or on semi-annual check-up (every 6 months). She mentioned she may consult with her physician on 15May2021. Caller sounded like she must have forgotten her physician's name. As noted in the Fact Sheet for Recipients, you should not get the Pfizer-BioNTech COVID-19 Vaccine if you had a severe allergic reaction after a previous dose of the vaccine or if you had a severe allergic reaction to any ingredient of the vaccine. The decision to receive the second dose for any other reason cannot be made by Pfizer. Refer you to speak to your healthcare provider about the risks of the vaccine compared to the risks of potentially not being fully protected against COVID-19 infection. Your healthcare provider knows your health situation and has access to information that can better help inform this decision. Referred to HCP in regards her concern to proceed with her second dose. Caller said that she had a question. She had her first COVID vaccine and she had a bladder infection last week and she didn't know if it is completely gone. She took an antibiotic (sulfa antibiotic) which she ended last Saturday and she was so tired and she was due to take her second shot tomorrow. Is it okay for her to take it or not. Last time, when she took her first dose she was tired afterwards but now she is tired before she even begins with the shot. She didn't know if she was tired from the bladder infection or what. She didn't want to cause anymore problems, she already has other aches and pains. Caller asked to speak to medical information now so she could know if she can take the 2nd dose or not. Caller was informed that MI was unable to tell her to take or not take the second dose but they may have resources to provide to assist her in making this decision. Caller declined to complete the report at this time, unable to obtain further details.  Information on the lot/ batch number has been requested.