Lymphoma; After receiving Mandatory Booster for College red blood cell &hemoglobin counts irregular; After receiving Mandatory Booster for College red blood cell &hemoglobin counts irregular; Now also have stepping gait/drop foot; Now also have stepping gait/drop foot; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 19-year-old male patient received BNT162b2 (BNT162B2), on 19Feb2022 as dose 3 (booster), single (Lot number: FJ5683) at the age of 19 years, in left arm for covid-19 immunisation. The patient had no relevant medical history. There were no concomitant medications. Vaccination history included: BNT162b2 (Dose Number: 2, Batch/Lot No: EW0179, Location of injection: Arm Left), administration date: 05Jul2021, when the patient was 18-year-old, for Covid-19 Immunization, reaction(s): "Swollen lymph nodes", "mild dry cough"; BNT162b2 (Dose Number: 1, Batch/Lot No: EW0183, Location of injection: Arm Left), administration date: 14Jun2021, when the patient was 18-year-old, for Covid-19 Immunization. The following information was reported: LYMPHOMA (hospitalization, medically significant, life threatening), outcome "not recovered"; RED BLOOD CELL COUNT ABNORMAL (hospitalization, life threatening), HAEMOGLOBIN ABNORMAL (hospitalization, life threatening), outcome "not recovered" and all described as "After receiving Mandatory Booster for College red blood cell &hemoglobin counts irregular"; PERONEAL NERVE PALSY (hospitalization, life threatening), GAIT DISTURBANCE (hospitalization, life threatening), outcome "not recovered" and all described as "Now also have stepping gait/drop foot". The patient was hospitalized for lymphoma, red blood cell count abnormal, haemoglobin abnormal, peroneal nerve palsy, gait disturbance (hospitalization duration: 4 day(s)). The events "lymphoma", "after receiving mandatory booster for college red blood cell &hemoglobin counts irregular" and "now also have stepping gait/drop foot" required physician office visit and emergency room visit. The patient underwent the following laboratory tests and procedures: Haemoglobin: (unspecified date) irregular, notes: red blood cell & hemoglobin counts irregular; Red blood cell count: (unspecified date) irregular, notes: red blood cell & hemoglobin counts irregular; SARS-CoV-2 test: (Dec2021) Negative, notes: Covid test type post vaccination=Nasal Swab; (Apr2022) Negative, notes: Covid test type post vaccination=Blood Test. Therapeutic measures were taken as a result of lymphoma, red blood cell count abnormal, haemoglobin abnormal. It was unknown if therapeutic measures were taken as a result of peroneal nerve palsy, gait disturbance.  Clinical course: Swollen lymph nodes and mild dry cough after 2nd dose. After receiving Mandatory Booster for College red blood cell & hemoglobin counts irregular. Required blood transfusions. Diagnosis is Lymphoma. only treatment is chemotherapy. Now also have stepping gait/drop foot. Adverse event start date Dec2021. It was unknown if any other vaccine in four weeks. The patient did not take any other medications in two weeks. The patient was not infected with covid prior vaccination. The patient was tested for covid post vaccination.; Sender's Comments: Linked Report(s) : US-PFIZER INC-202200951237 same patient and product, different dose and different events;