Stomach pain which ended in diverticulitis attack; Cold; Sweating; Nausea; Stomach pain which ended in diverticulitis attack; COVID arm; COVID Flu Symptoms; Right arm tender; Fever; Body aches/ Achy flu system; Splitting headache; Chills; Doesn't felt great; This spontaneous case was reported by a consumer and describes the occurrence of DIVERTICULITIS (Stomach pain which ended in diverticulitis attack) in an 86-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 031M20A and 031L20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Diverticulitis since 15-Jul-2018, Drug allergy (Allergy to Flagyl (metronidazole).) and Drug allergy (Allergy to Sulfa).   On 10-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 10-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. In February 2021, the patient experienced FEELING ABNORMAL (Doesn't felt great). On 09-Mar-2021,  after starting mRNA-1273 (Moderna COVID-19 Vaccine), the patient experienced HEADACHE (Splitting headache) and MYALGIA (Body aches/ Achy flu system). On 10-Mar-2021, the patient experienced PAIN IN EXTREMITY (Right arm tender). 10-Mar-2021, the patient experienced PYREXIA (Fever). On 10-Mar-2021 at 8:00 AM, the patient experienced INFLUENZA LIKE ILLNESS (COVID Flu Symptoms). In March 2021, the patient experienced CHILLS (Chills). On 19-Mar-2021 at 9:00 AM, the patient experienced VACCINATION SITE REACTION (COVID arm). On 12-Apr-2021, the patient experienced ABDOMINAL PAIN UPPER (Stomach pain which ended in diverticulitis attack). On 15-Apr-2021 at 10:00 AM, the patient experienced DIVERTICULITIS (Stomach pain which ended in diverticulitis attack) (seriousness criterion hospitalization). On an unknown date, the patient experienced NASOPHARYNGITIS (Cold), HYPERHIDROSIS (Sweating) and NAUSEA (Nausea). The patient was hospitalized from 15-Apr-2021 to 18-Apr-2021 due to DIVERTICULITIS. The patient was treated with Surgery (On 18-may-2021, patient underwent  intestinal surgery to remove diseased section.) for Diverticulitis. On 12-Mar-2021, HEADACHE (Splitting headache) and MYALGIA (Body aches/ Achy flu system) had resolved. At the time of the report, DIVERTICULITIS (Stomach pain which ended in diverticulitis attack), PAIN IN EXTREMITY (Right arm tender) and ABDOMINAL PAIN UPPER (Stomach pain which ended in diverticulitis attack) had not resolved, VACCINATION SITE REACTION (COVID arm), FEELING ABNORMAL (Doesn't felt great), NASOPHARYNGITIS (Cold), HYPERHIDROSIS (Sweating), CHILLS (Chills) and NAUSEA (Nausea) outcome was unknown, INFLUENZA LIKE ILLNESS (COVID Flu Symptoms) had resolved with sequelae and PYREXIA (Fever) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 10-Mar-2021, Body temperature: increased (High) increased.         No concomitant medications were reported. Patient reported to have no health issues for the past 18 months, before administration of mRNA-1273.  Very limited information regarding this events has been provided at this time.  The events are assessed unlikely related to product.   This case was linked to MOD-2021-023857 (E2B Linked Report).   Most recent FOLLOW-UP information incorporated above includes: On 07-May-2021: Additional info:updated events after second dose of scheduled two doses of mRNA-1273 - chills, fever, achy flu, tenderness of right arm, hives, stomach pain. Updated Serious event - Diverticulitis, which required hospitalization. Updated No prior history and no treatment received to events - COVID arm and COVID flu. Updated medical history to Allergy to Sulfa and Flaquil, Diverticulitis on 15-7-2018. On 11-May-2021: Additional info:Updated events - cold, sweating, nausea.AE information(merged with other case); Sender's Comments: Very limited information regarding this events has been provided at this time.  The events are assessed unlikely related to product. MOD-2021-023857:Patient's first dose