thrombocytopenia; "blood" in his mouth after the shot; blood blisters in his mouth after each of the three vaccines he received; had a severe rash on his trunk; 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: (Unknown).  An 81-year-old male patient received BNT162b2, BNT162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), as dose 3 (booster), single (Batch/Lot number: unknown) for covid-19 immunisation. The patient had no relevant medical history. The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (DOSE 1, SINGLE), for Covid-19 immunization, reaction(s): ""blood" in his mouth after the shot", "blood blisters in his mouth after each of the three vaccines he received", "low platelet count following vaccination/his platelets were extremely low", "had a severe rash on his trunk", "thrombocytopenia"; Bnt162b2 (DOSE 2, SINGLE), for Covid-19 immunization, reaction(s): ""blood" in his mouth after the shot", "blood blisters in his mouth after each of the three vaccines he received", "low platelet count following vaccination/his platelets were extremely low", "had a severe rash on his trunk", "thrombocytopenia". 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"; ORAL BLOOD BLISTER (non-serious), outcome "unknown", described as "blood blisters in his mouth after each of the three vaccines he received"; RASH (non-serious), outcome "unknown", described as "had a severe rash on his trunk". 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, platelet count decreased.  Clinical course: The caller is calling on behalf of her father and is inquiring about reports of low platelet count following vaccination. Caller clarified that she had read on the fact sheet that there were reports of thrombocytopenia. Caller is looking for any assistance with medical bills resulting from the vaccine. 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.  Caller stated that his father had emailed Pfizer after each shot. Caller did not specify the presentation of COVID-19 that the patient received. (monovalent/bivalent). Caller is looking for any assistance for medical bills resulting from the vaccine. Transferring agent states that the caller is calling for a family member about the Pfizer Covid 19 Vaccines. The caller mentioned that the family member had reactions after the vaccines and the booster dose. Caller comes onto the line and verifies information received from the transferring agent. Caller states that she is calling about her father. 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. States that her father is on a fixed income and now is being left with medical bills. Caller states that she was hesitant to call, but she feels like Pfizer should know. States that she read this was a side effect in a small amount of people and she thinks that her father is one of those people. Caller states that it is documented in the email her father sent to Pfizer early on about his rashes and blood blisters. 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. Caller states that they are not looking for any compensation like for suffering or anything, they are looking for her father's medical treatments to be covered. Caller states that her father has never experienced this in his whole life. Caller states that she is concerned about the possible legal ramifications to her father's credit and also her father's ability to pay his medical bills since he is being told that he might have to have the treatments for a long time. Caller states that she is not looking to sue or anything. She just wants to know if they have compensation. States that she got vaccines with no side effects, her husband got vaccines with no side effects, she knows most people are not having side effects. She believes though that her father is having side effects. Caller states that her father went in for another treatment and his platelets were all the way down again, she just wanted to see what Pfizer can do. Is there any help? States that if it means she has to share information to get the help then she will have no problem in sharing the information. Rashes on trunk: Caller states that this occurred after each of her father's 3 doses of the Pfizer Covid 19 Vaccines. Caller does not know the dates of her father's vaccines. Blood blisters in mouth: Caller states that this occurred after each of her father's 3 doses of the Pfizer Covid 19 Vaccines. Caller does not know the dates of her father's vaccines. Caller states that after the rashes and blood blisters, she believes, that her father went to Pfizer's website and wrote an email to Pfizer. 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. 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 denies any other medications or medical conditions for her father relevant to these events. Caller states that her father, at his age, takes no prescriptions and is healthier than the caller. Caller states that she just sees how stressed he is about his treatment and having to pay. 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. Prior Vaccinations (within 4 weeks), any other vaccinations within four weeks prior to the first administration date of the suspect vaccine was unknown.   The information on the batch/lot number for BNT162b2, BNT162b2 omi ba.4-5 has been requested and will be submitted if and when received.; Sender's Comments: Linked Report(s) : US-PFIZER INC-202300056891 Same patient/Vaccine, different event, different vaccine dose;US-PFIZER INC-202300057137 Same patient/Vaccine, different event, different vaccine dose;