weak with no strength in her arms, legs and body/she is still weak; On Saturday she had to crawl to the bathroom because she couldn't walk.; She does not have pain but she is weak and does not want to pick up a glass of water and is definitely fatigued; She stated she is still weak and shaky; Fell and her arms are black and blue from hitting against the doorway; she has been in bed all day sleeping on and off; has been sick in bed since getting the vaccine; she isn't eating a lot; sapped energy and couldn't get out of bed; Fell and her arms are black and blue from hitting against the doorway; Diarrhea; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 73 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 02Apr2021 (Lot number: ER8734) at the age of 73 years as dose 1, single for covid-19 immunisation. Relevant medical history included: "cancer" (unspecified if ongoing); "she had Covid in December and was only sick for a couple of days", start date: Dec2020 (unspecified if ongoing); "she had Covid in December and was only sick for a couple of days" (unspecified if ongoing); "seasonal allergies" (unspecified if ongoing); "High blood pressure" (ongoing); "She lists spores, mold, grass, trees, dust, says everyone is allergic to dust, she has had this most of her life" (unspecified if ongoing), notes: She lists spores, mold, grass, trees, dust; "She lists spores, mold, grass, trees, dust, says everyone is allergic to dust, she has had this most of her life" (unspecified if ongoing); "She lists spores, mold, grass, trees, dust, says everyone is allergic to dust, she has had this most of her life" (unspecified if ongoing), notes: She lists spores, mold, grass, trees, dust; "flu" (unspecified if ongoing), notes: She would get the flu 2 to 3 times a year. Concomitant medication(s) included: TYLENOL; HYDROCHLOROTHIAZIDE taken for hypertension; LOPERAMIDE HYDROCHLORIDE; ARMOUR THYROID. The following information was reported: ASTHENIA (non-serious), outcome "unknown", described as "weak with no strength in her arms, legs and body/she is still weak"; GAIT DISTURBANCE (non-serious), outcome "unknown", described as "On Saturday she had to crawl to the bathroom because she couldn't walk."; FATIGUE (non-serious), outcome "unknown", described as "She does not have pain but she is weak and does not want to pick up a glass of water and is definitely fatigued"; TREMOR (non-serious), outcome "unknown", described as "She stated she is still weak and shaky"; FALL (non-serious), outcome "unknown", SKIN DISCOLOURATION (non-serious) with onset 03Apr2021, outcome "unknown" and all described as "Fell and her arms are black and blue from hitting against the doorway"; DIARRHOEA (non-serious) with onset 03Apr2021, outcome "recovered" (2021), described as "Diarrhea"; SLEEP DISORDER (non-serious), outcome "unknown", described as "she has been in bed all day sleeping on and off"; ILLNESS (non-serious), outcome "unknown", described as "has been sick in bed since getting the vaccine"; DECREASED APPETITE (non-serious) with onset 03Apr2021, outcome "unknown", described as "she isn't eating a lot"; ASTHENIA (non-serious) with onset 03Apr2021, outcome "not recovered", described as "sapped energy and couldn't get out of bed". Additional information: Other Conditions: She lists spores, mold, grass, trees, dust, says everyone is allergic to dust, she has had this most of her life. The caller stated she spoke with safety and let them know she had a bad reaction. She stated she had been weak with no strength in her arms, legs and body. Saturday, Sunday, and Monday she was in bed all day. On Saturday she had to crawl to the bathroom because she couldn't walk. She does not have pain, but she was weak and does not want to pick up a glass of water and is definitely fatigued. She couldn't walk or take care of herself. Tuesday and today she has been in and out of bed. She stated she was still weak and shaky. Her legs and arms were still shaky and weak, and she had no strength to cook so she isn't eating a lot. She stated she tried calling her doctor, but they haven't gotten back to her, so she was just being patient. The caller was calling about the vaccine. She says she got it last Friday and she as been sick in bed ever since. She reports sapped energy, she couldn't get out of bed, she had to crawl to the toilet. She was weak, shaky and can't stand to cook. She was not in any pain, just weak, tired, shaky, her legs don't want to hold her up, her arms don't want to hold things. She clarified that the vaccine is the COVID one. On Saturday morning she woke up. She was in bed all day and had to crawl on her hands and knees to get to the bathroom. She tried to get up and walk but she fell and hurt herself. Luckily, she didn't break a bone. She was black and blue. She fell hard. Her knees and arms are black and blue from hitting against the doorway. She says she was still shaky; she had a cane in the house that can help her out a little bit.  No follow-up attempts are possible. No further information is expected.