This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient. A 60-year-old male patient received bnt162b2 (BNT162B2), administered in deltoid left, administration date 25Feb2021 13:40 (Lot number: EL9266) at the age of 60 years as dose 1, single for Covid-19 immunisation. Relevant medical history included: "HIV positive", start date: 1997 (ongoing), notes: Verbatim: HIV Positive, States he is undetectable; levels are up above 1000; "Osteoporosis" (ongoing), notes: Diagnosed 3 years ago. States he just did another bone density test last year; "Chronic pancreatitis" (ongoing), notes: Verbatim: Chronic pancreatitis; States diagnosed 4-5 months ago; "High Blood Pressure" (ongoing), notes: Verbatim: High Blood Pressure, Diagnosed 4 years ago when he had his stents put in; "Heart Stents" (unspecified if ongoing), notes: Verbatim: Heart Stents, Put in 4 years ago; "Degenerative cervical disc disease and fractured disc in neck" (ongoing), notes: Diagnosed 6-7 Years Ago. States he sees a neurologist about pinched nerves in his back; "Degenerative cervical disc disease and fractured disc in neck" (ongoing), notes: Diagnosed 6-7 Years Ago. States he sees a neurologist about pinched nerves in his back; "Blood pressure" (unspecified if ongoing); "losing weight" (unspecified if ongoing). Concomitant medication(s) included: BABY ASPIRIN taken for vascular device user (ongoing); METOPROLOL TARTRATE taken for vascular device user (ongoing); LISINOPRIL taken for blood pressure abnormal (ongoing); ISOSORBIDE MONONITRATE taken for vascular device user (ongoing). The following information was reported: CHILLS (non-serious) with onset 25Feb2021 14:10, outcome "recovered" (25Feb2021), described as "Chills"; TREMOR (non-serious) with onset 2021, outcome "recovered" (2021), described as "shaking". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were not taken as a result of chills, tremor. Additional information: Why was the patient taking Covid Vaccine (Verbatim): Requested due to health status, HIV Positive even though undetectable, doctor said shouldn't have an. Concomitant Products Aspirin: Baby Aspirin; been taking it every since had the heart trouble, been at least 4 years. Started 4 years ago when he had his stents put in. Dosage text: 81mg, one in the morning each day, by mouth. Concomitant Products Metoprolol Tartrate: Started 4 years ago when he had his stents put in. States blood thinner and blood pressure in one. Dosage text: Unknown Dose; takes one in the morning and one the evening. Concomitant Products Lisinopril: States he is supposed to take 1.5 tablets but he usually only takes 1; Started 4 years ago when he had his stents put in. Dosage text: 20mg, once a day by mouth. Concomitant Products Isorbmono: Started 4 years ago when he had his stents put in; confirmed spelling of medication with caller. Dosage text: 30mg once a day by mouth. Caller states that he took the first shot three weeks ago and he is due for the second shot. States he has a question about a side effect. States they make you wait for fifteen minutes after the shot, then right after he waited, he left to go do some lab work and he started getting chills that lasted thirty to forty-five minutes. He states he doesn't know if that was to be expected. States he also in on a blood thinner, aspirin and metoprolol tartrate. Asking if chills were a common side effect or not. Weight: States he has been losing weight. Clarifies that started before the vaccine due to having chronic pancreatitis. Chills AE: states that he snapped out of it on the way home. States he was sitting in the lab waiting to do lab work and he was shaking so bad that they couldn't get the needle in to do the lab work and said he would come back another time. States it wore off after thirty to forty-five minutes. History of all previous immunization with the Pfizer vaccine considered as suspect: None. Additional Vaccines Administered on Same Date of the Pfizer Suspect: None. Events did not require any emergency Room or Physician Office visit. Prior Vaccinations (within 4 weeks): None. AE(s) following prior vaccinations: None. Family Medical History Relevant to AE(s): None. No follow-up attempts are possible. No further information is expected.