now being told that she has Hashimoto's disease which is an autoimmune disease; has anaphylactic issues; has allergic reactions that turn her bright red from head to toe; experienced allergy symptoms to foods that she has never reacted to before; This spontaneous case was reported by a consumer and describes the occurrence of AUTOIMMUNE THYROIDITIS (now being told that she has Hashimoto's disease which is an autoimmune disease) and ANAPHYLACTIC REACTION (has anaphylactic issues) in a 71-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 001B21A and 038B21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.   On 15-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 10-Apr-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 14-Jun-2021, the patient experienced FOOD ALLERGY (experienced allergy symptoms to foods that she has never reacted to before). On an unknown date, the patient experienced AUTOIMMUNE THYROIDITIS (now being told that she has Hashimoto's disease which is an autoimmune disease) (seriousness criterion medically significant), ANAPHYLACTIC REACTION (has anaphylactic issues) (seriousness criterion medically significant) and HYPERSENSITIVITY (has allergic reactions that turn her bright red from head to toe). At the time of the report, AUTOIMMUNE THYROIDITIS (now being told that she has Hashimoto's disease which is an autoimmune disease), ANAPHYLACTIC REACTION (has anaphylactic issues), FOOD ALLERGY (experienced allergy symptoms to foods that she has never reacted to before) and HYPERSENSITIVITY (has allergic reactions that turn her bright red from head to toe) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In July 2021, Allergy test: negative (Negative) tested for food allergies in July & environmental allergies in October but nothing showed up. In October 2021, Allergy test: negative (Negative) tested for food allergies in July & environmental allergies in October but nothing showed up.         No concomitant medication information was provided. No treatment medication was provided.  Patient reported her experiences after receiving 2 doses of the Moderna Covid-19 Vaccine.  Caller said that an epidemiologist told her that she had symptoms that mimic Mast Cell Activation Syndrome.  She had allergic reactions that turn her bright red from head to toe and she had anaphylactic issues.  She had also experienced allergy symptoms to foods that she had never reacted to before.  Her first episode was on 14 Jun 2021.  She was tested for food allergies in July and environmental allergies in October but nothing showed up.  She was being told that she had Hashimoto's disease which was an autoimmune disease.  Company comment: This case concerns a 71-year-old female patient, with no reported medical history, who experienced the serious, unexpected event of hashimoto's thyroiditis and serious expected event of anaphylactic reaction. The patient received two doses of mRNA 1273 COVID-19 vaccine. The patient initially experienced food allergy 2 months after the second dose of mRNA 1273 COVID-19 vaccine. And on unknown date, patient experienced allergic reactions that turn her bright red from head to toe and she has anaphylactic issues. She was tested for food allergies 3 months and 6 months after the vaccine which were negative. On unknown date, patient was told that she has Autoimmune (Hashimoto's) thyroiditis. The benefit-risk relationship of mRNA 1273 vaccine is not affected by this report.; Sender's Comments: This case concerns a 71-year-old female patient, with no reported medical history, who experienced the serious, unexpected event of hashimoto's thyroiditis and serious expected event of anaphylactic reaction. The patient received two doses of mRNA 1273 COVID-19 vaccine. The patient initially experienced food allergy 2 months after the second dose of mRNA 1273 COVID-19 vaccine. And on unknown date, patient experienced allergic reactions that turn her bright red from head to toe and she has anaphylactic issues. She was tested for food allergies 3 months and 6 months after the vaccine which were negative. On unknown date, patient was told that she has Autoimmune (Hashimoto's) thyroiditis. The benefit-risk relationship of mRNA 1273 vaccine is not affected by this report.