Muscle ache in upper back; upper back just below the neck is still kind of problematic; achiness; arm was not very sore; This is a spontaneous report from a contactable consumer (patient). A 69-year-old male patient received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE) via an unspecified route of administration administered in left arm on 10Apr2021 17:30 (Lot Number: EW0153) as single dose for COVID-19 immunization. Medical history included hypertension from 1997, patient first started taking the medication for this high blood pressure was around the year 1997 or something like that, he thought around 1997, he first stated taking blood pressure medications. Concomitant medications included losartan taken for hypertension; nifedipine taken for hypertension. The patient experienced muscle ache in upper back / upper back just below the neck is still kind of problematic on 11Apr2021, achiness on 11Apr2021, arm was not very sore on 11Apr2021. No treatment received. The clinical course was reported as follows: Patient just got his first dose of the Pfizer Vaccine on Saturday at 5:30 in the afternoon and he was experiencing and might not be even be related and he wanted to know if something that was not listed and was not that troublesome but he was wondering if someone else had same situation. Basically, it was like some muscle ache in his upper back and not very far from his neck and it was not real bad but he just, it was not until right this morning (12Apr2021) or maybe in the middle of the night he wanted to go to bathroom for real quick. He felt there was some achiness but that was not real bad way. Again it could be related to the vaccine injection what or so ever. Probably he wanna see his primary care doctor. He wanna call him in the night for his upper back just below the neck was still kind of problematic. He wanted to not play games with it pretty long. It's not constantly, it was when he got sitting on the sofa and he got up it could bother him certain types of bending over could bother him. There was not like constantly bothering him but like he said he didn't want to play games, he was 69, he didn't want to play with his spine or anything like that. So, he guess his question was, has anyone else called with something like which he described. It means it can be related or it could it be he just slept long or he have not been exercising so there is no motion that he did that was out of the ordinary, that's all he have to say really. As for event start date, patient guessed it was last night. So, that would have been 11Apr2021 because today is 12 but today the 12, is were it pretty noticeable when he said noticeable it meant its like he was well aware that there was something going on there and like he said he wanted to call his primary care doctor it its not gone but tomorrow morning. He was gonna call his primary care doctor just to be sure he might want him to get X-ray or something. Patient need to be there on May 1st because that's the 3 week for the second injection. He had his first that's all he knew. He made an appointment and they stressed the importance of being at that day and not coming late or not cancelling. They wanna make sure that he be there on that days binds some serious issues come in the way but they want to keep that follow up 3 week appointment for his second injection. Before getting my shot, he went online and asked google some questions and he was told that they said, like 2 weeks after his second Pfizer dose he is pretty much protected for like 6 months but there is no 100 percent guarantee. So, it is not a life time protection, by any means, it's just 6 month approximately and that's all he can tell us. The muscle ache was where the back trouble there was just a one little area was in his upper back, below his neck. His arm was pretty good. His arm was not very sore hardly comparing to some people that they told him that they experienced. His arm not pretty good. It did not hurt very much at all whereas one of his friend (not further clarified) told him in his experience it hurt pretty serious for a day or so and then it went away but in his case it's strictly to the area in his upper back and the area below the neck if it was a muscle ache it might be a spinal, it might be a vertebrate or disc or something he didn't know what. As for events outcome, patient stated he would suppose it is persisting. The outcome of the events was not recovered. No follow-up attempts are needed. No further information is expected.