Received it 6 days too early since it's should be a 21 day spacing; Did feel flushed a little bit afterwards; This is a spontaneous report received from a contactable reporter(s) (Other HCP) Nurse from medical information team.  A 22-year-old female patient received bnt162b2 (BNT162B2), administered in deltoid right, administration date 10Sep2021 13:30 (Lot number: FC3183, Expiration Date: 31Oct2021) at the age of 22 years as dose 2, 0.3 ml single for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. Past drug history included: Prednisolone, reaction(s): "drug allergy", notes: patient does have allergies and is allergic to Prednisolone. Vaccination history included: Bnt162b2 (Dose:1 single, Batch/lot number: FC3181), administration date: 26Aug2021, when the patient was 22 years old, for COVID-19 Immunization. The following information was reported: INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION (non-serious) with onset 10Sep2021 13:30, outcome "unknown", described as "Received it 6 days too early since it's should be a 21 day spacing"; FLUSHING (non-serious) with onset 10Sep2021, outcome "recovered" (10Sep2021), described as "Did feel flushed a little bit afterwards".  Additional information: No other vaccines given today (10Sep2021) and no problems with vaccines in past that she believed. History of all previous immunization with the Pfizer vaccine considered as suspect (or patient age at first and subsequent immunizations if dates of birth or immunizations are not available) was None. Additional vaccines administered on same date of the Pfizer suspect if applicable, list all vaccines administered on same date with the Pfizer vaccine considered as suspect was none. AE(s) following prior vaccinations was None. Provide other relevant medical history including but not limited to these conditions: diagnosed allergies, compromised immune status, respiratory illness, genetic/chromosomal abnormalities, endocrine abnormalities (including diabetes) and obesity allergies, allergic to Prednisolone (Prednisone). Family medical history relevant to AE(s) was none. Caller stated she had a patient that received her first dose of the Comirnaty on 26Aug2021 and was given her second dose today 10Sep2021. Caller was told by the patient she was due to get her dose yesterday. But when the caller looked backed at her records she noticed it was too soon to receive her second dose. She was looking for information about the dose being given too soon and what to do. Dates for was due for the vaccine yesterday and they just now discovered that today was Day 15 not Day 22 was (From: Sep2021 To: Ongoing); for received it 6 days too early since it's should be a 21 day spacing was (From: Sep2021 To: Ongoing); for did feel flushed a little bit afterwards was (From: 10Sep2021 To: Ongoing); Dates for drank water and recovered was (From: 10Sep2021 To: Ongoing) and Dates for instructed not to drive home if not feeling well was (From: 10Sep2021 To: Unspecified). Did feel flushed a little bit afterwards for a few seconds. She drank water and recovered. Was instructed not to drive home if not feeling well. Provided the time of onset of AE(s) was 1:30pm CST. Reporter seriousness for was due for the vaccine yesterday and they just now discovered that today was Day 15 and not Day 22; for received it 6 days too early since it's should be a 21 day spacing; for did feel flushed a little bit afterwards and for drank water and recovered was not serious. Reporter seriousness for instructed not to drive home if not feeling well: Unspecified. Did any AE(s) required a visit to Emergency Room and Physician Office was no. Relevant Tests was none.   No follow-up attempts are possible. No further information is expected.