Diabetes; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 49 year-old female patient received bnt162b2 (COMIRNATY), administered in arm right (right upper arm), administration date 27Feb2021 (Lot number: EN6203) at the age of 48 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "Back surgery", start date: 2018 (unspecified if ongoing). Patient had no diabetes in her family. Never been diabetic before in her life. She was going to her doctor for a check up that was performed once a year, kept putting it off because of the pandemic. The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (First Dose, LOT: EL9265, Vaccine location: right upper arm), administration date: 06Feb2021, when the patient was 48 years old, for Covid-19 Immunization. The following information was reported: DIABETES MELLITUS (medically significant) with onset Aug2021, outcome "not recovered", described as "Diabetes". Patient has had all three doses of the Pfizer covid 19 vaccine. Once she took it, she found out after her second shot, that she was diagnosed with diabetes, has been sick ever since. Patient stated 3 months ago (Aug2021) she was diagnosed with diabetes in between the 2nd and 3rd shot, the vaccine attacked her pancreas and destroyed antibodies, her sugar level went over 600, she was put on two insulins and two pills to try to get it under control. Patient didn't know the diabetes and COVID-19 Vaccines were related until a few days ago. As soon as she took the vaccine, she got diabetes. Patient was having symptoms, but didn't know what it was, she was dying of thirst, couldn't get enough to drink. Since she took the vaccine, she started feeling thirsty and it kept getting worse. Would drink one liter of water. Then 15 minutes later be thirsty again. Couldn't get enough to drink. Her sugar level was causing the thirstiness. Patient weighted 170 when this first started, since diagnosed with diabetes, in the past three months she has lost almost 40 pounds, was told by her doctor that because her sugar was so high, over 600, it was eating her fat. Called her primary doctor who ordered blood work, her sugar level was over 600. She was sent to doctor immediately. Doctor wanted to admit her to the hospital. Patient didn't want to go to the hospital because of the virus. She was treating it the best she could at home. She was started on the injections.  She doesn't want to lose her pancreas. Patient wanted to get information about joining a clinical trial that could help her reverse her diabetes. The event "diabetes" was evaluated at the physician office visit. The patient underwent the following laboratory tests and procedures: blood glucose: went over 600; weight: 170, notes: when first dose started; lost almost 40 pounds, notes: in past three months. Therapeutic measures were taken as a result of diabetes mellitus: Patient was on four insulin shots a day: Basaglar 25 units every morning, LOT: D261917AA, Expiration Date: Jun2022; Lispro: LOT: D261886CAA, Expiration Date: 19Jun2022, Dose depends on her sugar level, not a set amount, has a chart she goes by; Metformin: 1000mg twice a day; Rybellace (Rybellace is generic for Jardiance, she just got it yesterday): 10mg tablet once a day. They can't get her diabetes under control, she is not stabilized yet. Patient doesn't want to be on insulin because it's a nightmare. On 11Oct2021, she took the booster Comirnaty (LOT: FH8020), injected into right upper arm.