flu symptoms; son has been sick; having pain in his back and up to his neck; itching/itching where the shot was injected; muscle aches; chills; Lot of mucus coming up; arm was red; brain fog; swollen lymph nodes under arm; Lump on arm where he got injection; did not feel well; This is a spontaneous report from a contactable consumer (mother) reported for her son. This report 1 of 3 (consumer and her son's father both had side effects). A 17-years-old male patient received first dose of BNT162B2 (Pfizer-Biontech COVID-19 Vaccine, Solution for injection, batch/lot number and expiry date: not reported), via an unknown route of administration in right arm on 12Apr2021 (at the age of 17-years-old) as dose 1 single for COVID-19 immunisation at drug store, it was like 10:45 am. The patient's medical history and family medical history relevant to events were none. Concomitant medication was not reported. History of all previous immunization with the Pfizer vaccine considered as suspect was none. All vaccines administered on same date with the Pfizer vaccine considered as suspect was none. Any other vaccinations within four weeks prior to the first administration date of the suspect vaccine was none. On an unknown date in Apr2021, the patient experienced swollen lymph nodes under arm, lump on arm where he got injection, did not feel well. On 14Apr2021, arm was red duration of event was one day, brain fog, muscle aches, chills duration of event was one day, lot of mucus coming up. On 15Apr2021, itching/itching where the shot was injected. The patient has swollen lymph nodes under his arm (caller noticed that within the second day after getting the vaccine and was getting better); a big lump where the injection was, arm was red (there were lumps are on his arm and look like he was flexing. He was itching and it was red yesterday but no longer red. There was a lump there. He was getting better, it was scary. He noticed that the second day, but now he was experiencing brain fog.); itching (just at the shot site, around there. It was his right arm. This morning was when it happened, it was still going on), brain fog (he forgot what he was doing at work. He was cooking and was like what was I doing. He noticed this yesterday. That has gotten better) and muscle aches (he said this happened when he first got the shot after they left the drug store. He said within an hour he started having pain in his back and up to his neck. He said he went to bed and it went away. Then, he called and said he did not feel well. Caller told her son to come home, and he came home). Caller stated these were kind of like flu symptoms and that was normal. He has chills (happened within an hour after the vaccine, within a half hour after injection. Caller's son said he was good now), itching where the shot was injected and lot of mucus coming up (caller adds that her son was spitting up a lot of mucus. This did not start until he got the shot. It was still going on). Caller got the shot and was sick for two hours, and then was fine but her son has been sick since Monday. Caller called the doctor yesterday and was told that the reactions are normal. No additional information. He did not take anything as treatment, because he did not want to. Caller told him to maybe take something, and she adds maybe he took Tylenol but she does not know. The doctor said that if he did not get better, to make an appointment, but she thinks he was getting better. The outcome of the events swollen lymph nodes under arm, lump on arm where he got injection, brain fog was recovering. The outcome of the events arm was red and chills was recovered on 15Apr2021. The outcome of the events lot of mucus coming up and itching/itching where the shot was injected was not recovered, while the outcome of the remaining events was unknown.  No follow-up attempts are possible; information about lot/batch number cannot be obtained.