white blood cell count being lowered/ WBC down to 8.6; arm was sore; This is a spontaneous report from a contactable consumer (Patient, self-reported). A 60-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Batch/Lot Number: EN6207), dose 2 via an unspecified route of administration, administered in Arm Right (right upper arm, as reported), on 27Mar2021 14:00 as, single for COVID-19 immunisation. Medical history included airborne herpes simplex pneumonia (started and stopped eight years ago, WBC remain chronically elevated, as reported), joints started swelling (patient states with the virus she has fogginess, joints started swelling, arthritis, and a rash on her neck, as reported), arthritis, a rash on her neck, Hep C vaccine (she knows they gave her Hep C vaccine in the hospital but she had no reaction), She did have reaction to a flu vaccination (She did have reaction to a flu vaccination and her arm swelled up; in 1996. She has no NDC, lot or expiration date for that flu vaccine). Reportedly, she thinks it was injection error because a nursing administrator gave it to her and she had not worked on the floor in a long time. The patient's concomitant medications were not reported. Patient took first dose of bnt162b2 (Batch/Lot Number: EN6202), on right upper arm, on 05Mar2021 14:00, for COVID-19 immunisation. Patient did not receive other vaccine in four weeks of vaccination. Reportedly, Patient would like to know when will another dose of the Pfizer COVID vaccine will need to be administered such as a booster dose. Patient stated her HCP did not know this information and stated that no one knew at this time. Response reported was, need for a booster dose of Pfizer-BioNTech COVID-19 vaccine based on duration of protection or impact of variant strains has not yet been determined. On 25Feb, Pfizer and BioNTech announced they initiated an evaluation of the safety and immunogenicity of a potential third dose of the Pfizer-BioNTech COVID-19 vaccine (BNT162b2) to understand the effect of a booster on immunity against COVID-19 caused by the currently circulating and potential newly emerging variants. The administration of more than a 2-dose series of Pfizer BioNTech COVID-19 Vaccine is not approved. Patient stated she would like to know if the Pfizer COVID vaccine is suppose to help your immune system. Patient stated 8 years ago she almost died from a virus they called airborne herpes simplex virus pneumonia. Caller states with the virus she has fogginess, joints started swelling, arthritis, and a rash on her neck. Patient stated when she had pneumonia it was in all 5 lobes of the her lungs and she was out of it for days and the doctors did not think she was going to make it. Doctor said she had no damage to her lungs. She didn't know what was wrong and the doctor's didn't know either until she went to a convenient care on a Saturday and was put on 6 L of oxygen and they got her oxygen saturation up to 80%. Caller states she was completely shut down. She found out that this condition was found mostly in patients with a tracheostomy and she used to work around trach patients but not direct patient care she worked in admissions and along side nurses. After receiving the Pfizer COVID vaccine second dose two months later she had some blood work done and her white blood cell count was 8.6. Caller states that this is the lowest her white blood cell count has been in 8 years. She couldn't believe it and was wondering if the vaccine helps the immune system. She also experienced arm soreness when she touched her arm after the second dose of the vaccine but if she didn't touch it then it didn't hurt. She had no side effects with the first dose. She was not saying that she feels any better due to her white blood cell count being lowered. The vaccine worked for her and it helped her body. She wishes they would come out with more vaccines because otherwise our world was going to be in trouble. On 27Mar2021, the patient experienced arm was sore, on unspecified date of May2021 white blood cell count being lowered/ wbc down to 8.6 and event was serious (medically significant). Patient did not visited emergency room or physician office. The patient underwent lab tests and procedures which included blood immunoglobulin a: normal and white blood cell count: 8.6 on May2021. Therapeutic measures were taken as a result of arm was sore. Outcome of the event white blood cell count being lowered/ wbc down to 8.6 was unknown, for arm was sore recovered.  History: Caller states she has tried to stay away from people and she doesn't go anywhere. When she first heard about the COVID 19 virus she had an N95 mask on that day. Reports the virus she had eight years ago, they called it airborne herpes simplex pneumonia. She called the CDC and they had never heard of it; she also called the state health department who didn't know it. Adds even the librarian at the hospital had not heard of it and all she can find out is a lot of trach patients have it. Adds one infectious disease doctor she knew said she had a patient that had this virus and it got in the doctor's eye. Caller adds she remembers the doctor's eye was messed up. Caller adds after having had the airborne herpes simplex pneumonia, the caller was told never to work in the hospital again or even to visit. Since then when she has done that she will get sick. Adds she was told she had pneumonia in all five lobes and they didn't expect her to live. The pulmonologist said there was no scarring in her lungs but some way it shut her down but she survived.  Tests: Reports she had an IGA that was fine. Adds now for some reason her WBC will go up. The doctor told her even though it is over 10 or around 10 it is still okay. Caller adds before she got sick with the airborne herpes simplex pneumonia her WBC would never be that high.  Information on the lot/batch number has been requested.