Age: 61.0
Sex: M
Vaccine: COVID19
Symptoms: Vitamin B12, Vitamin B12 deficiency, Weight
Clinical narrative: a swelling in my neck; my platelet count is low; my B12 level was low; got cancer after getting Pfizer COVID-19 Vaccine; This is a spontaneous report received from a Consumer or other non HCP, Program ID.  A 66-year-old male patient received BNT162b2 (BNT162B2 NOS), on 18Feb2021 as dose number unknown (booster), single (Batch/Lot number: unknown) at the age of 61 years for covid-19 immunisation. The patient's relevant medical history included: "Covid-19", start date: Feb2020 (unspecified if ongoing). The patient's concomitant medications were not reported. Vaccination history included: BNT162b2 (DOSE 1, LOT: EN6198, Expiration date: 18Feb2021), administration date: 18Feb2021, when the patient was 61-year-old, for Covid-19 immunization; Bnt162b2 (DOSE 2), for Covid-19 immunization. The following information was reported: NEOPLASM MALIGNANT (medically significant) with onset 2022, outcome "unknown", described as "got cancer after getting Pfizer COVID-19 Vaccine"; SWELLING (non-serious), outcome "unknown", described as "a swelling in my neck"; PLATELET COUNT DECREASED (non-serious), outcome "unknown", described as "my platelet count is low"; VITAMIN B12 DEFICIENCY (non-serious), outcome "unknown", described as "my B12 level was low". The patient underwent the following laboratory tests and procedures: lab work: (10Jun2025) Unknown results, notes: I had lab work this morning; Platelet count: (unspecified date) Low; Vitamin B12: (unspecified date) Low; Weight: (unspecified date) 107; (unspecified date) 107.9. Therapeutic measures were taken as a result of neoplasm malignant.  Clinical course: The consumer, who has received six doses of the Pfizer COVID-19 vaccine (the last administered in September 2024), reported experiencing severe chills despite using a heating pad. They are currently undergoing treatment for cancer, which was diagnosed in the spring of 2022 following the discovery of a neck swelling resembling a goiter during a routine physical. The consumer believes their immunocompromised state-due to both the cancer and the co-targeted chemotherapy drugs they are taking-may have contributed to their current condition. They mentioned a low platelet count and a history of COVID-19 infection once in February 2020, with no reinfections until now. The consumer is currently experiencing symptoms consistent with COVID-19, including intense chills, and is questioning whether these symptoms are related to the virus or another underlying issue.  They also noted receiving B12 injections due to a deficiency, with four weekly injections followed by a daily oral supplement of 1000 mcg. During the current treatment protocol, they were advised to pause their cancer medications for five days.  The consumer expressed frustration about being redirected when seeking answers regarding potential side effects and whether their current symptoms could be linked to COVID-19 or their immunocompromised status. They emphasized their desire to understand the cause of their symptoms and whether chills are a recognized part of the COVID-19 symptom profile.; Sender's Comments: Linked Report(s) : US-PFIZER INC-202500119014 same patient/drug, different dose/event;