Headache; Neck pain; Slight chills; little bit of a fever; Fatigue; Sore arm; sore arm at the injection site; patient slept for 2.5 hours as soon as she got in the house; This is a spontaneous report from a contactable consumer (patient). A 64-year-old female patient received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Formulation: Solution for injection, Lot number; EN6202), via intramuscular route of administration, in upper right arm on 27Feb2021, as single dose for COVID-19 immunisation. The patient medical history included COVID positive (she tested positive on 25Oct2020 and had COVID for 3 weeks, up until the middle of Nov. She explains one of her first symptoms around the first 3 days was a pounding headache and pounding neck pain. she had a very slight temp and some chills because of the temperature, of course. These were her very first symptoms and she also had a dry cough at the time), post COVID lungs, very mild asthma (after getting COVID, she wouldn't say she is short of breath, but she does get out of breath quicker. She was being treated with a regimen of supplements), ongoing A-fib (metoprolol), ongoing breathing (Singulair), and neck was out (her neck was out prior to receiving the vaccine, but it was even close to the discomfort she felt yesterday). Concomitant medications included metoprolol for A-fib (Atrial fibrillation), and montelukast sodium (SINGULAIR) for breathing. The patient previously took flu shot (prior vaccinations, she had her first shot, she mentions she had been putting it off for years, she was always scared, she went to the doctor's office in Dec and the doctor told it may feel a little feverish or a little fluish, but the caller she even feel any soreness in her arm. She had absolutely no reaction at all to the flu shot she received. She confirms this was back in Dec2020, which has been at least 7-9 weeks ago. The patient did not receive any vaccinations within 4 weeks of prior vaccinations. The patient received COVID vaccine on Saturday around quarter to three or 3pm. Strangely after getting the vaccine on Saturday, 27Feb2021, patient slept for 2.5 hours as soon as she got in the house. She typically gets up really early, but she slept in Sunday morning. She was feeling a little bit of a headache, which she read was pretty common, but then the headache progressed to a pounding headache and neck pain on 28Feb2021. The headache and neck pain got worse from about 10am until about 7pm last night. Later in the evening, she used hot compresses with a face cloth around her neck. Her neck has been a little out prior to receiving the vaccine, but it was never like the kind of pain she was having yesterday. Yesterday, she was in much bigger pain. She also had slight chills and a little bit of a fever yesterday on 28Feb2021, not immediately. It was not in the first 6-10 hours. All of her symptoms started yesterday along with fatigue on 28Feb2021. One of the very most notable symptoms she had when she originally had COVID that she did not have yesterday was the dry cough. The dry cough was not present yesterday. She was only calling today because the side effects she experienced with the COVID-19 vaccine actually mimicked the symptoms she had the first few days of her COVID experience. When probed for the outcome, the caller states around 8pm last night, her headache seemed to be dissipating. She also had taken a shower and used warm packs. Aside from that, she was really feeling better. She also wanted to add that she had a very sore arm at the injection site on 28Feb2021, but this has improved by 70%. Her arm was still sore, but it's nothing big. She woke up this morning and was feeling great and all of her symptoms have improved. She was out walking. She was told if she had any discomfort to don't take any Advil and just let her body assimilate with the vaccine. As much as she wanted to, she didn't take anything and she still hasn't. She also mentioned she didn't take any of her supplements either, she didn't want it to be foreign in her body. She just took her baby aspirin, her metoprolol, stating she had A-fib, and Singulair for her breathing. Other than that, she took nothing. She was told to give her body a day. The outcome of events was recovering.  No follow-up attempts are possible; information about batch number cannot been obtained