In the left arm pit area, where he put deodorant, was painful; He felt pain in his left chest muscle; His left chest felt swollen when he touched it; He had a little pain in his left arm on Saturday, between 2:00PM-3:00PM; This is a spontaneous report from a contactable consumer. A 37-year male consumer (patient) received Bnt162b2 (BNT162B2; Formulation: Solution for injection), dose 2 via unknown route of administration, administered in arm left on 01May2021 as SINGLE DOSE for COVID-19 immunization, and Bnt162b2 (BNT162B2; Formulation: Solution for injection, Lot Number: ER8733) dose 1 Intramuscularly, administered in arm left on 03Apr2021 as SINGLE DOSE for COVID-19 immunization. Patient was 37 years old age at time of vaccination. The patient's medical history was not reported. The patient's concomitant medications were not reported. No emergency room, and physician office visit required. . It was reported that he received his second COVID-19 Vaccine on Saturday, 01May2021, and was still having pain in his (left) arm and (left) chest (muscle). He said his employer told him after 3 days, he had to get a notification from his doctor for why he was sick. He said the clinic he went to said the could not give him the notification his employer was looking for because their clinic didnt provide the COVID-19 Vaccine. He said he had to go back to work tomorrow, and he was not ready to go back to work tomorrow. Caller asked if there was anyway Pfizer could give him a letter to give to his employer for the pain he had in his (left) arm and (left) chest (muscle). Caller was advised that Pfizer was the manufacturer of the COVID-19 Vaccine and did not provide medical advice or services. The caller was offered transferred to Pfizer Medical Information for further assistance.   Reporter Type: Stated he worked for Company as a delivery guy, and put together beds. Reported he had a little pain in his left arm on Saturday, between 14:00PM-15:00PM. He said he fell asleep, and woke up on Sunday (02May2021), and his chest felt swollen. He clarified he felt pain in his left chest muscle, and that the pain was all in the left chest muscle and his left armpit. He said he didnt have any pain on the inside, but he could tell the left chest muscle felt swollen when he touched it. He said he really did not have any pain in his left arm anymore, but in the left arm pit area, where he put deodorant, was painful. He said after a couple days his left chest muscle and left armpit were getting better, but he was not ready to go back to work and put hospital beds together. He said on Saturday morning (01May2021) he exercised and did not know if that had anything to do with the pain he was experiencing.  Reported he does not have a doctor at this time. Adverse Event (AE) Details:  Reported he received his second COVID-19 Vaccine on Saturday, 01May2021, and was still having pain in his left arm, and left chest muscle. He said he had a little pain in his left arm on Saturday, between 14:00PM-15:00PM. He said he fell asleep, and woke up on Sunday (02May2021), and his left chest felt swollen. He said he felt pain in his left chest muscle, and that the pain was all in the left chest muscle and his left armpit. He said he didnt have any pain on the inside, but he could tell the left chest muscle felt swollen when he touched it. He said he really didnt have any pain in his left arm, but in the left arm pit area, where he put deodorant was painful. He said after a couple days his left chest muscle and left armpit were getting better, No follow-up attempts are needed. No further information is expected.