lost all her hair/ all of her hair has fallen out again; \This is a spontaneous report from a contactable consumer (patient). A 57-years-old female patient received bnt162b2 (BNT162B2), dose 2 via an unspecified route of administration, administered in Arm Right on 05May2021 09:30 (Batch/Lot Number: EW0176) as 2ND DOSE, SINGLE DOSE for covid-19 immunisation. Medical history included ongoing asthma, ongoing vitiligo, dairy free diet, covid-19 from Feb2020 to an unknown date, alopecia from May2020 and ongoing, autoimmune disorder from an unknown date and unknown if ongoing and bald (her hair started falling out in Apr2020 and May2020. By Jun2020 she was bald), gluten free diet and autoimmune disorders. She had the Coronavirus last Feb2020 and in May2020 she had lost all her hair after having the Covid 19 virus. She does have alopecia and vitiligo and those 2 diseases went crazy when she had the Covid 19 virus. She also lost so much pigment in her skin because of the Covid 19 virus and the vitiligo. She was treated by her dermatologist and her hair grew back. Her hair came back 3 inches high on her head. She has just regrown her hair after having the Covid 19 virus. She was washing her hair and almost all of it fell out. She was asking if the Covid 19 vaccine did this. She wanted Pfizer to know this was what happened to her and she needeed to know if the vaccine caused her hair to fall out. She was fine until all her hair fell out in the last few weeks. Her hair literally fell out in droves. She did have a Covid 19 virus antibody test in Jul2020 and she did have antibodies. At the time she lost her hair because of the Covid 19 virus her dermatologist prescribed prednisone. She took the Prednisone 3 times a week to help calm down whatever was happening in her body. By Jun2020 she was bald. After receiving the second Covid 19 vaccine in May2021 her hair went from looking thin to now she's bald.The patient previously received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, formulation: Solution for injection, Batch/Lot Number: EW0164, Expiry Date: Unknown), an unspecified route of administration in right arm on 14Apr2021, as 1st dose, single dose for covid-19 immunisation. The patient previously received Prednisone for Alopecia. She received the second Covid 19 vaccine on 05May2021 in her right arm, Lot# EW0176 NDC/Expiry not known. First Covid 19 vaccine information was in the suspect product field. When probing why she decided to get the Covid 19 vaccine she said for prevention but also because she does have autoimmune disorders and she needeed to protect herself. Her daughter had the Covid 19 virus in Dec2020 and the caller had symptoms at that time of feeling sick and was really tired and she thought she could really contract the Covid 19 virus again. She decided to get the Covid 19 vaccine to help her not get the Covid 19 virus again. She experienced the hair loss with the second Covid 19 vaccine. Within three weeks of receiving the Covid 19 vaccine her hair started falling out. After receiving the second Covid 19 vaccine in May2021 her hair went from looking thin to now she's bald. When her hair fell out with the Covid 19 virus she had changed her diet to gluten and dairy free to see if her diet was something that caused her hair to fall out when she had the Covid 19 virus. After the diet change and medication treatment her hair started coming back and she lost 15 lbs. After her hair started falling out with after she received the second Covid 19 vaccine she was seen by her dermatologist who prescribed Prednisone, 60mg a day for 7 days, then 40mg a day for 7 days, then 20mg a day for 7 days. Therapeutic measures were taken as a result of lost all her hair/ all of her hair has fallen out again. The outcome of the event was not recovered.   Information on batch/Lot number was obtained. Further information has been requested.