thrombocytopenia; "blood" in his mouth after the shot; had a severe rush on his trunk; blood blisters in his mouth after each of the three vaccines he received; low platelet count following vaccination/his platelets were extremely low; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team, Program ID.  An 81-year-old male patient received BNT162b2 (BNT162B2), as dose 1, single (Batch/Lot number: unknown) for covid-19 immunisation. The patient had no relevant medical history. There were no concomitant medications. The following information was reported: PLATELET COUNT DECREASED (non-serious) with onset 2022, outcome "unknown", described as "low platelet count following vaccination/his platelets were extremely low"; THROMBOCYTOPENIA (medically significant), outcome "unknown"; MOUTH HAEMORRHAGE (non-serious), outcome "unknown", described as ""blood" in his mouth after the shot"; RASH (non-serious), outcome "unknown", described as "had a severe rush on his trunk"; ORAL BLOOD BLISTER (non-serious), outcome "unknown", described as "blood blisters in his mouth after each of the three vaccines he received". The events "thrombocytopenia", ""blood" in his mouth after the shot", "low platelet count following vaccination/his platelets were extremely low" and "blood blisters in his mouth after each of the three vaccines he received" required physician office visit. The patient underwent the following laboratory tests and procedures: Full blood count: (2022) platelets were extremely low. Therapeutic measures were taken as a result of thrombocytopenia.   Clinical information: Caller stated that her father received the first and second vaccine and one booster but did not receive the second booster as he was afraid. The caller stated that he had a severe rush on his trunk and "blood" in his mouth after the shot. The information on the batch/lot number for BNT162b2 has been requested and will be submitted if and when received. Caller states that her father actually wrote to Pfizer. States that her father initially got very bad rashes on his trunk and blood blisters in his mouth after each of the three vaccines he received. Caller states that soon after that her father had a full blood count done and his platelets were extremely low. Caller states that they called it thrombocytopenia. Caller states that never in her father's 80 years has he had blood work that showed this. Caller states that her father is now being treated by an oncologist/hematologist and the treatments are very expensive. Caller states that her father was diagnosed with the low platelets 9-10 months ago. Caller states that it was so dangerously low, he could have bled out. Low Platelets: Caller states that her father was diagnosed in the late summer of 2022, or something like that. States that at first, she was not concerned but now her father has been in treatment for a while. Caller states that her father has just had the unspecified treatments for low platelets. States they are injections. Caller states that her father was having transfusions at first, but that did not work. Denies any other labs, testing, or treatments for her father relevant to these events. Caller states that even though those events occurred after each vaccine, her father kept getting the vaccines because he did not want to get Covid. Caller mentions that her father has never even taken a flu shot, he does not believe in flu shots.; Sender's Comments: Linked Report(s) : US-PFIZER INC-202300057138 Same patient/Vaccine,different event,different vaccine dose;US-PFIZER INC-202300057137 Same patient/Vaccine,different event,different vaccine dose;