sever chest pain; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non-HCP) from medical information team for a Pfizer sponsored program. The reporter is the parent. A 13-year-old female patient received bnt162b2 (BNT162B2), administration date 30Jul2021 (Batch/Lot number: unknown) at the age of 13 years as dose 1, single for covid-19 immunisation. The patient relevant medical history and concomitant medications were not reported. The following information was reported: CHEST PAIN (non-serious), outcome "unknown", described as "sever chest pain".  Additional Information: Question: Call was warm transferred. The call originated from Pfizer-sponsored program. Documenting possible duplicate AE, e-transmitting report for review (13 years old, Female). No new AE information obtained from the reporter. Consumer/Caregiver calling on behalf of her 13-year-old daughter who had her 1st dose of the Pfizer-BioNTech Covid19 Vaccine last 30July2021, then on August 4th and 5th, her daughter experienced severe chest pain. She wants to know the effectiveness of having only 1 dose of the vaccine. Consumer/Caregiver calling on behalf of her 13-year-old daughter who had her 1st dose of the Pfizer-BioNTech Covid19 Vaccine last 30July2021. She wants some information and guidance if its okay to get the 2nd dose past the 42 days after the 1st dose. Then on August 4th and 5th, her daughter experienced severe chest pain. She wants to some information or elaboration on what Myocarditis and Pericarditis is. Follow-up (28Sep2021): new information is received. Additional Context: Warm transfer from Pfizer-sponsored program agent. Transfer agent has a caller on the other line along with an interpreter. The reason for the transfer is that the reporter was calling about her daughter, who is 13 years old, and had the first dose of the COIVD vaccine and had severe chest pain. The caller wanted to know the effectiveness and safety with it being after 43 days for her daughter to get the second vaccine. She also wants someone to elaborate more on myocarditis and pericarditis and she wants to know the effectiveness of just having 1 dose of the vaccine. she says yes, she wants to know the effectiveness of the 2nd dose and the effectiveness with just one dose. Event Details included This happened 4 days after getting the first dose of the COVID vaccine, but she doesn't remember the exact day. The reporter's daughter had her COVID vaccine on a Friday and then she felt bad on the following Wednesday and Thursday which was the 5th and 6th day after. Inquired for if this has ended and the reporter states that it has ended. The reporter took her daughter to the paediatrician who checked her and they sent her to a cardiologist to check better. The cardiologist did an electro and an echo (documented as provided by caller) and put a holster on her daughter for 25 days which had ended yesterday and the studies show that everything is fine. Inquired for when this ended for her daughter and the reporter says, like she said she had the first dose on 30JUL2021, a Friday, and then the first symptoms showed on Wednesday and she only had the symptoms on Wednesday and Thursday, confirmed to 04AUG2021 and 05AUG2021. History/ Investigations: No, the reporter's daughter is on no medications and she didn't feel this before and the only thing that is new is the COVID vaccine. Her daughter doesn't take anything.  Follow-up (12Nov2021): This follow-up is being submitted to notify that the lot/batch number is not available despite the follow-up attempts made. Follow-up attempts completed. No further information is expected.