where I has neurological reaction to toxins in environment/caused me a lot of trouble adverse reaction. The kind of reaction that I have in response to toxins; where I has neurological reaction to toxins in environment/caused me a lot of trouble adverse reaction. The kind of reaction that I have in response to toxins; where I has neurological reaction to toxins in environment/caused me a lot of trouble adverse reaction. The kind of reaction that I have in response to toxins; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non-HCP). The reporter is patient. A patient (no qualifiers provided) received BNT162b2, BNT162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), on 27Sep2022 as dose 4 (booster), single (Batch/Lot number: unknown) for covid-19 immunisation. The patient's relevant medical history included: "I have a medical condition called Multiple chemical sensitivity" (ongoing), notes: have a medical condition called Multiple chemical sensitivity; "I has neurological reaction to toxins in environment" (ongoing), notes: where I has neurological reaction to toxins in environment; "I has neurological reaction to toxins in environment" (ongoing), notes: where I has neurological reaction to toxins in environment. The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (DOSE 3, I had the three earlier Pfizer Shot), for Covid-19 immunization; Bnt162b2 (DOSE 2), for Covid-19 immunization; Bnt162b2 (DOSE 1), for Covid-19 Immunization. The following information was reported: NEUROLOGICAL SYMPTOM (non-serious), ALLERGY TO VACCINE (non-serious), CONDITION AGGRAVATED (non-serious) all with onset Sep2022, outcome "unknown" and all described as "where I has neurological reaction to toxins in environment/caused me a lot of trouble adverse reaction. The kind of reaction that I have in response to toxins".  Additional information: Reaction / Event as Reported by the Primary Source for Translation: Caused me a lot of trouble adverse reaction. The kind of reaction that pateint had in response to toxins. Patient stated, Patient have the Pfizer Booster yesterday and patient had adverse reaction and patient have a medical condition called Multiple chemical sensitivity where has neurological reaction to toxins in environment and patient had the three earlier Pfizer Shot and patient had none of these reaction to toxins in the earlier Pfizer shot but the booster that patient had yesterday caused me a lot of trouble adverse reaction. The kind of reaction that I have in response to toxins so, patient was wondering if the ingredients changed significantly not the generic material but the carriers, the lipid and other preservative whatever is in there give them change significantly from earlier versions. So, the patient wanted to know if some ingredients changed from earlier Pfizer Shot that patient have over the last year and half. So, yesterday Patient had the Pfizer Bivalent (Hence, captured as covid19 vaccine Bivalent). The patient was informed about the role of Pfizer Drug Safety department and also informed about the role of Pfizer Medical Information department.   No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.