This is a spontaneous report received from contactable consumer. This consumer (patient) reported for herself. A female patient of unspecified age received second dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Batch/Lot number was unknown) via an unspecified route of administration on 19Mar2021 as a DOSE 2, SINGLE for COVID-19 immunization. Historical Vaccine included first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Batch/Lot number was unknown) via an unspecified route of administration on an unspecified as a DOSE 1, SINGLE for COVID-19 immunization. The patient medical history and concomitant products were not reported. Caller was asking if she didn't receive the full dose, what would happen if she were to get a 3rd dose and also asking if it is common to have leakage or bleeding from her arm. Response was Told caller as Pfizer did not study the vaccine to be given as 3 doses, we are unable to speak for what would occur if 3 doses were to be given. Responded per press release regarding a 3rd booster dose that has been initiated for a study to evaluate the safety and tolerability of a booster vaccine of the Pfizer-BioNTech COVID-19 vaccine. Told caller per clinical experience, the vaccine is essentially pricking the arm, so blood may be leaking out after administration. Caller stated she had her second dose of Pfizer's COVID vaccine last Friday on 19Mar2021. Caller stated, "It wasn't until I got home that I realized that the needle was in my arm, but then I felt something trickle. I don't know if it was blood or leakage from the vaccine. It was wiped up with a wet gauze and patted down dry, and then the Band-Aid was placed on. Regulatory Authority says it's ok if half the dose goes into you. I was told that after the 2nd dose, I would probably experience severe side effects, but I didn't have any. Caller asking how long does she have to wait until she can get an antibody test and which antibody test is recommended and also asking what is the efficacy rate of the vaccine after one dose. The consumer reported that, dates for Whenever the nurse took the needle out of her arm, she felt the pressure of the needle. She felt a trickle down her arm. She does not know if it was blood or vaccine. Reporter seriousness for Whenever the nurse took the needle out of her arm, she felt the pressure of the needle. She felt a trickle down her arm. She does not know if it was blood or vaccine: Unspecified. It was not until she got home, she realized that she felt the needle in her arm. She felt something dripping out and the nurse wiped it up with alcohol and patted it dry and put a band aid on it. People told her that after the second dose of the Covid-19 vaccine she would probably have a stronger reaction than the first dose of the Covid-19 vaccine. She knows that in two weeks, she can meet with other vaccinated people. After the vaccination, although she could not see her arm, she thought she felt something. Could not tell if it was blood, she felt trickling down or was that part of the vaccine. She read that the Regulatory Authority said that it is okay if half of it came out. There is no way for her to tell now what it was. She is asking how long will she have to wait to get the antibody test done. She knows on 02Apr2021, she will be fully vaccinated, since it is two weeks after the second dose. She knows that the antibody test is different than the Covid-19 test post vaccine. Clarified that whenever the nurse took the needle out of her arm, she felt the pressure of the needle. She felt a trickle down her arm. She does not know if it was blood or vaccine. The only reason she is aware of the difference is because she had the first dose of the Covid-19 vaccine too. It went in and she remembered quickly getting the band aid on. The nurse was cleaning her arm, and the patting it to dry. Wet alcohol was put all over her shoulder. She did not have that happen the first time. She noticed a difference between the first dose of the Covid-19 vaccine and the second dose of the Covid-19 vaccine. The trickle she felt could have been blood or vaccine. She is concerned if it was vaccine. She is asking how long she will have to wait before she meets with people, she is asking if it is still two weeks. She is asking how long she has to wait to get the antibody test done for her peace of mind. She is asking what kind of antibody test she would have to get done. She heard that regular Covid-19 will not show a Covid-19 level but the other one shows antibodies. She reads a lot. She has been on hold for over an hour. She gave a lot of information to the first woman. She has been on the call for 116 minutes. She is asking does she need to go to a regular doctor or an infectious disease doctor to get an antibody test. She is asking why Pfizer needs her address and email address. She does not want her personal information sold. She declined having the time to submit a report. She requested to get directly over to Regulatory Authority. Pfizer Covid-19 vaccine. Noticed a difference between the first and second shot. The first one went in, and the band aid quickly went on. With the second dose, she noticed a trickle, unsure if it was blood or the vaccine, the nurse patted dry and covered with band aid. She did not have that happen the first time. She noticed a difference between the first dose of the Covid-19 vaccine and the second dose of the Covid-19 vaccine. She declined having the time to submit a report. She requested to get directly over to Regulatory Authority. Unable to clarify details provided or gather additional information. The clinical outcome of the event was unknown. No follow-up attempts are possible; no further information expected.