[after second dose] bout of gastroparesis; This spontaneous case was reported by a consumer and describes the occurrence of IMPAIRED GASTRIC EMPTYING ([after second dose] bout of gastroparesis) in a 54-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 013A21A, 040H21A and 032H21A) for COVID-19 vaccination.     Concurrent medical conditions included Ehlers-Danlos syndrome and Food allergy.   On 13-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 12-Apr-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 15-Dec-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. In April 2021, the patient experienced IMPAIRED GASTRIC EMPTYING ([after second dose] bout of gastroparesis) (seriousness criterion medically significant). At the time of the report, IMPAIRED GASTRIC EMPTYING ([after second dose] bout of gastroparesis) outcome was unknown.            No concomitant medication was reported.  No treatment information was reported.  Patient took Moderna vaccine three times, 040H21A on 13Mar2021, 013A21A on 12Apr2021 and 032H21A on 15Dec2021.    Patient did not have any side effects after the first dose.  In April, when she had the second shot, the next day, she got a bout of gastroparesis.  She gets it occasionally, but it's usually triggered by the weirdest thing, like eating chicken, so she gave up eating chicken 20 years ago. She also has a condition called Ehlers Danlos syndrome. She chocked it up as coincidence. Close to a week and a half ago, she had the booster, and the next day she woke up with another bout of gastroparesis. Something about it was triggering this. She wants to know if there's any chicken protein or anything like chicken in the Moderna vaccine because the chicken can trigger her gastroparesis.  Company Comment: This case concerns a 54-year-old female patient, with reported medical history of food allergy and Ehlers-Danlos syndrome, who experienced the serious unexpected adverse event of Impaired gastric emptying. The event occurred in an unknown date after the administration of the second dose of the mRNA-1273 vaccine. The outcome at the time of the report was Unknown. The rechallenge is not applicable since the event occurred after the second dose. The reported history of food allergy and Ehlers-Danlos syndrome remains as a confounder for the event. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.   This case was linked to MOD-2021-428373 (Patient Link).; Sender's Comments: This case concerns a 54-year-old female patient, with reported medical history of food allergy and Ehlers-Danlos syndrome, who experienced the serious unexpected adverse event of Impaired gastric emptying. The event occurred in an unknown date after the administration of the second dose of the mRNA-1273 vaccine. The outcome at the time of the report was Unknown. The rechallenge is not applicable since the event occurred after the second dose. The reported history of food allergy and Ehlers-Danlos syndrome remains as a confounder for the event. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.