Weight is 100 and lost 7lbs in last 2 weeks.; 5th dose Pfizer COVID vaccine; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP and Physician), Program ID.  A 90-year-old female patient received BNT162b2 (BNT162B2), on 14Jul2022 as dose 5 (booster), single (Lot number: FF7139) at the age of 90 years for covid-19 immunisation. The patient's relevant medical history included: "COPD" (ongoing), notes: Comment: COPD Not provided; "MAC rare lung disease", start date: 2019 (unspecified if ongoing), notes: Comments: MAC rare lung disease; "Covid", start date: 06Jun2022 (unspecified if ongoing), notes: Her mother had COVID virus on 06Jun2022; "smoker" (unspecified if ongoing), notes: She also has COPD because she was a smoker in her 20's.; "Pseudomonas" (ongoing), notes: Her condition, she was a COPD person who has rare lung disease called MAC diagnosed in 2019. She has Pseudomonas, and is still being treated, which is part of the MAC. It comes and goes and they keep things at bay by giving inhaled antibiotics every few months.; "Blood pressure" (ongoing), notes: She is 90 years old and is on all kinds of medications. Blood pressure meds, vitamins that they give her, etc. The patient took concomitant medications. Vaccination history included: BNT162b2 (First 2 Pfizer COVID vaccines were given at (name-withheld)., Pfizer COVID Vaccine 1st dose 27Mar2021, Lot EP6955, expiration unknown, injected in left upper arm.), administration date: 27Mar2021, when the patient was 89-year-old, for Covid-19 immunization; BNT162b2 (First 2 Pfizer COVID vaccines were given at (name-withheld)., 2nd dose given 17Apr2021, Lot ER8731, expiration unknown, injected in left upper arm.), administration date: 17Apr2021, when the patient was 89-year-old, for Covid-19 immunization; BNT162b2 (3rd dose given at the (center name-withheld) 22Oct2021, Lot EW0182, expiration 30Nov2021, injected in Unknown site.), administration date: 22Oct2021, when the patient was 90-year-old, for Covid-19 immunization; moderna covid-19 vaccine (4th dose - Moderna COVID vaccine on 11Nov2021, Lot 052E21A, expiration is Unknown, Injected in unknown site.), administration date: 11Nov2021, when the patient was 90-year-old, for Covid-19 immunization. The following information was reported: INCORRECT DOSE ADMINISTERED (non-serious) with onset 14Jul2022, described as "5th dose Pfizer COVID vaccine"; WEIGHT DECREASED (non-serious), described as "Weight is 100 and lost 7lbs in last 2 weeks.". Relevant laboratory tests and procedures are available in the appropriate section.  Additional Context:  She had a 91 year old mother that had the Pfizer COVID 19 vaccine, however, her mother's last dose of booster administered to her was Moderna. She mentioned that after that shot, her mother had difficulty with her health and constantly dizzy and always tired. She mentioned currently her mother was on the COVID ward in a care facility. While reporting for herself, caller provided information for her mother. This report was to capture information for her mother. She clarified information for her mother. She did not had an address or email for primary care provider. Mother: since she was now bed ridden, she did not know actual height. Weight was 100 and lost 7lbs in last 2 weeks. Her mother had COVID virus on 06Jun2022. She took pill thing, could not take Paxlovid and had to take something starting with an M and was not effective as the others. She could not take Paxlovid due to kidneys. No name, lot or expiration for the medication starting with M that was not as effective. She did not had reactions to the Pfizer vaccines, she just thinks it was reaction to being double dosed with the Moderna vaccine so close to the last Pfizer one. Dizziness and being tired was after getting Moderna. She was admitted to rehab place on 28Oct2022, and within a week or so later was when they were going to start rehab. She did not say when it started because when they started rehab it was only a few days thereafter that they gave her the double boost and she cannot tell 1st couple of reports where they sent her when it started. Her mother got first two shots at (name-withheld) with her. Her mother had a rare lung disease when she got it at 2019. She also has COPD because she was a smoker in her 20's.   With her, she did not act like anything was wrong and did not even feel bad. That was on all of the Pfizer COVID Vaccine shots that she had. The only exception was the random shot. The Pfizer shots, she never had a problem with. She started this in and out of the hospital thing. They wanted her to go to a rehab and get to next level to increase activity, so she did not had to keep going into the ER every couple of weeks. The rare lung disease was diagnosed a year before COVID came around and was quarantined for 1 year prior to COVID quarantine. When she was in the hospital the last time before rehab, she wanted them to give the 3rd booster shot. They gave it to her on 26Oct2021. She got transferred to rehab on 28Oct2021, and she delivered all medical records to the rehab hospital. All 3 of her shots were Pfizer COVID Vaccine. She then got the Moderna vaccine in addition because they did not look at her records. Her mother was having difficulty because she was dizzy and tired. They could not get her out of bed to walk around and do things because she was not feeling well. She would take 2-3 steps at rehab and would sit down because she was dizzy and weak. She does not trust pharmacist and doctor's views, and each will give a different story. Some think it was good to do and some say not. She found out last week she was given Moderna on 11Nov2021, not even 3 weeks after getting Pfizer shot. She wonders if having a double boost that close and Moderna that close to Pfizer was that the reason she was having that trouble and having to stay in a nursing home. Now she was totally bed ridden because they did not get her up and don't try. Her muscles was atrophied. She did get COVID and thank God did not get it as strong as her roommate, maybe it was because of the double boosting. She went through 12 days of quarantine and a week and a half later, she got the 4th shot, which would have been her 5th shot. She got Pfizer COVID vaccine for that one. Before patient went in while she was in hospital, she was in a walker and was walking and even right before she got Pfizer shot. She thinks she was also walking after the Pfizer Shot. After rehab when things went downhill, and she thinks it was related to double dosing. She was 90 years old and on all kinds of medications. Blood pressure meds, vitamins that they give her, etc. She was not the caretaker anymore and does not know what they tweak or changed. She did not know what medications she was on now. Her condition, she was a COPD person who had rare lung disease called MAC diagnosed in 2019. She had Pseudomonas, and still being treated, which was part of the MAC. It comes and goes and they keep things at bay by giving inhaled antibiotics every few months. She was in a study at (name-withheld) for this.  No follow-up attempts are possible; No further information is expected.  Follow up (09Sep2022): This is a spontaneous follow-up report from the same contactable Physician. This physician reported in response to HCP telephonic follow-up activity initiated in cross referenced case which included that: Updated Information Included: Reporter Information (Mailing address captured Protect Confidentiality/Correspondence Contact unchecked, Follow-up Activities Possible) updated.