Sundowning/sundowners; feel tired/Tiredness; headache on right side of head/not terrible, not like a hangover; Muscle pain/all over her body; chills; low temperature/was just a couple digits off; Joint pain/all over her body; during these days that she felt so awful she couldn't work her way through it; had a bad spell; felt bad; restless legs; felt unwell; tossing and turning, trouble sleeping; tossing and turning, trouble sleeping/did not sleep except for a couple of times; This is a spontaneous report from a contactable consumer. A 78-year-old female patient received the first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 MRNA VACCINE) lot number: EN6199 and expiration date: Jun2021, via an unspecified route of administration, administered in right arm on 15Mar2021 as single dose for Covid-19 immunisation. Medical history included arthritis, diabetes, hypertension, rotator cuff repair, cancer (mom and dad both have passed from it. two uncles and grandparents have had cancer. cancer is pretty relevant in the family), alcoholism (mom and dad both have passed from it). Concomitant medication(s) included metformin taken for diabetes mellitus, metoprolol tartrate taken for hypertension, losartan potassium and lovastatin, ascorbic acid, betacarotene, biotin, calcium, chlorine, chromium, copper, cyanocobalamin, dl-alpha tocopheryl acetate, folic acid, iodine, magnesium, manganese, molybdenum, nickel, nicotinamide, pantothenic acid, phosphorus, phytomenadione, potassium, pyridoxine hydrochloride, retinol, riboflavin, selenium, silicon, thiamine, vanadium, vitamin d nos, xantofyl, zinc (CENTRUM SILVER +50). The patient stated that she was fine until a few days ago, 4 or 5 days ago she started to feel tired, headache on one side of her head, muscle pain and chills, low temperature, joint pain and just felt unwell. By the weekend the patient stated that she was down on the couch and her son was worried about her and suggested that she go to the hospital, which she refused. The patient described the headache as 'just there', states not terrible, not like a hangover. Since waking up today, she has not had a headache. She also added that she had trouble sleeping on Saturday night (03Apr2021). She stated she did not sleep except for a couple of times and she was just tossing and turning and took ibuprofen and it didn't help. The patient stated that the muscle pain and joint pain was all over her body. She had rotator cuff surgery on her right-side years ago and during this time she was carrying groceries on her own and her left shoulder started throbbing like the rotator cuff pain that she had in the past and she recognized it right away. She stated that she is not real sure if the muscle pain in her shoulder is a result of the vaccine or not. She has full of arthritis and was not sure if the pain is caused by the vaccine or not, but with her regular arthritis, if she has been sitting and gets up and walks around she is able to work her way through it, but during these days that she felt so awful she couldn't work her way through it. The patient stated that she feels like she has been suffering from sundowners but states she feels it's not related to COVID vaccine. She writes herself notes and forgets what notes mean. The patient was on hold so long with the first one. The patient had her first vaccination on March 15th and she am supposed to go back Wednesday April 7th for the second one. She had a bad spell for about 4 days last week. Today, she feel fine and have no temperature. She didn't have a temperature when she felt bad. The patient was having chills, restless legs, couldn't sleep. Now, the patient was feeling better. The patient recovered from the event headache unilateral, muscle pain, chills, body temperature decreased, generalized joint pain and feeling unwell on 05Apr2021, for events difficulty sleeping and restless was recovered on 04Apr2021. The outcome of other events was unknown.