felt like someone was stepping on my throat and back/ I thought I was possibly having a heart attack, a collapsed lung, extreme acid reflux or something stuck in my throat; Primary care office who said not to get 2nd vaccine; Indigestion; Pressure on her back; Felt like she wasnt getting oxygen to her legs; Unable to get out of bed; sayed out of work; weird bout of diarrhea/ two bouts of diarrhea; throat on fire; Difficulty in breathing/ breathless for about 9 days/ trouble breathing; Coughing/gas in chest; Gas in chest; Chest pain; felt vey ill; fatigue/exhaustion/ exhausted/ recurring fatigue; chills; extremely tired/ extreme fatigue/ fatigue the night of vaccine; Throat tightness; joints felt tighter than usual; slight tightness in throat became flame thrower; pain in the arm/ arm pain; feeling kind of stiff/ difficulty bending over and lying down/felt like oxygen not getting to muscles/ couldnt bend over; Slept a lot; Aching bones; This spontaneous case was reported by a consumer and describes the occurrence of JOINT STIFFNESS (joints felt tighter than usual), MUSCULOSKELETAL STIFFNESS (feeling kind of stiff/ difficulty bending over and lying down/felt like oxygen not getting to muscles/ couldnt bend over), PAIN IN EXTREMITY (pain in the arm/ arm pain), CHEST DISCOMFORT (felt like someone was stepping on my throat and back/ I thought I was possibly having a heart attack, a collapsed lung, extreme acid reflux or something stuck in my throat) and THROAT IRRITATION (throat on fire) in a 57-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 014M20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Allergy to vaccine (flu vaccine) since 2011, Allergy to antibiotic (cipro), Allergy to antibiotic (Flagyl), Allergy to antibiotic (amox-clav), Irritable bowel syndrome since 01-Jan-1998, Diverticulitis since 01-Jan-1998, Acid reflux (esophageal) since 01-Jan-1998, Osteoporosis since 03-Jan-2019, Osteopenia since 03-Jan-2019 and Heart fluttering (saw a heart doctor at one point). Concomitant products included PROBIOTICS NOS from 08-Mar-2011 to an unknown date and MAGNESIUM from 01-Jan-2021 to an unknown date for Irritable bowel syndrome, VITAMIN C [ASCORBIC ACID] from 08-Mar-1973 to an unknown date for Prophylactic, VITAMINS NOS (MULTIVIT [VITAMINS NOS]) from 08-Mar-1973 to an unknown date for Supplementation therapy.    On 02-Mar-2021 at 2:00 PM, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 02-Mar-2021, the patient experienced JOINT STIFFNESS (joints felt tighter than usual), MUSCULOSKELETAL STIFFNESS (feeling kind of stiff/ difficulty bending over and lying down/felt like oxygen not getting to muscles/ couldnt bend over), PAIN IN EXTREMITY (pain in the arm/ arm pain) and THROAT IRRITATION (slight tightness in throat became flame thrower). On 02-Mar-2021 at 2:45 PM, the patient experienced THROAT TIGHTNESS (Throat tightness). On 03-Mar-2021, the patient experienced FATIGUE (extremely tired/ extreme fatigue/ fatigue the night of vaccine). On 04-Mar-2021, the patient experienced CHILLS (chills). On 06-Mar-2021, the patient experienced THROAT IRRITATION (throat on fire), DYSPNOEA (Difficulty in breathing/ breathless for about 9 days/ trouble breathing), COUGH (Coughing/gas in chest), FLATULENCE (Gas in chest), CHEST PAIN (Chest pain) and FATIGUE (fatigue/exhaustion/ exhausted/ recurring fatigue). 06-Mar-2021, the patient experienced MALAISE (felt vey ill). On 10-Apr-2021, the patient experienced DIARRHOEA (weird bout of diarrhea/ two bouts of diarrhea). On an unknown date, the patient experienced CHEST DISCOMFORT (felt like someone was stepping on my throat and back/ I thought I was possibly having a heart attack, a collapsed lung, extreme acid reflux or something stuck in my throat), BONE PAIN (Aching bones), IMPAIRED WORK ABILITY (sayed out of work), PRODUCT DOSE OMISSION ISSUE (Primary care office who said not to get 2nd vaccine), DYSPEPSIA (Indigestion), MUSCULOSKELETAL DISCOMFORT (Pressure on her back), LIMB DISCOMFORT (Felt like she wasnt getting oxygen to her legs), BEDRIDDEN (Unable to get out of bed) and SOMNOLENCE (Slept a lot). The patient was treated with ACETAMINOPHEN at an unspecified dose and frequency. On 04-Mar-2021, FATIGUE (extremely tired/ extreme fatigue/ fatigue the night of vaccine) had resolved. On 11-Mar-2021, THROAT IRRITATION (throat on fire) had resolved. On 15-Mar-2021, MUSCULOSKELETAL STIFFNESS (feeling kind of stiff/ difficulty bending over and lying down/felt like oxygen not getting to muscles/ couldnt bend over), PAIN IN EXTREMITY (pain in the arm/ arm pain), DYSPNOEA (Difficulty in breathing/ breathless for about 9 days/ trouble breathing) and CHEST PAIN (Chest pain) had resolved with sequelae, IMPAIRED WORK ABILITY (sayed out of work) and THROAT IRRITATION (slight tightness in throat became flame thrower) had resolved. At the time of the report, JOINT STIFFNESS (joints felt tighter than usual), CHEST DISCOMFORT (felt like someone was stepping on my throat and back/ I thought I was possibly having a heart attack, a collapsed lung, extreme acid reflux or something stuck in my throat), FLATULENCE (Gas in chest), BONE PAIN (Aching bones), THROAT TIGHTNESS (Throat tightness), PRODUCT DOSE OMISSION ISSUE (Primary care office who said not to get 2nd vaccine), SOMNOLENCE (Slept a lot) and CHILLS (chills) had resolved, COUGH (Coughing/gas in chest), MALAISE (felt vey ill), DIARRHOEA (weird bout of diarrhea/ two bouts of diarrhea), DYSPEPSIA (Indigestion), MUSCULOSKELETAL DISCOMFORT (Pressure on her back), LIMB DISCOMFORT (Felt like she wasnt getting oxygen to her legs) and BEDRIDDEN (Unable to get out of bed) outcome was unknown and FATIGUE (fatigue/exhaustion/ exhausted/ recurring fatigue) had not resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 08-Mar-2021, Body temperature: 100f (High) 100F. On 08-Mar-2021, SARS-CoV-2 test: negative (Negative) negative and negative (Negative) Negative. On 01-Jun-2021, Allergy test: not allergic to shellfish (Negative) not allergic to shellfish.     mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was withdrawn on an unknown date.       On 02-Mar-2021, the patient experienced slight tightness in throat after she left the vaccine clinic and she had arm pain and fatigue the night of the vaccine. On 06-Mar-2021 the patient felt very ill when she woke having difficulty breathing, bending over, coughing, gas in chest, feeling like a flame thrower in her trachea and like someone was stepping on her back; occasional elevated temperature, extreme fatigue, aching bones, sleeping a lot, unable to lie on back and these strong symptoms lasted  three days.  The patient stayed out of work until 15-Mar-2021. She felt like oxygen was not getting to her muscles until about 10-Apr-2021, when she had a weird bout of diarrhea after which her muscles felt better but at time of report was still having issues with exhaustion. She thought she was possibly having a heart attack, a collapsed lung, extreme acid reflux or something stuck in her throat. After she read about Covid and myocarditis, she said she was pretty sure this is what she started to have on 04-Mar-2021 as she said her symptoms seemed to fit. Other test included: On unreported dates: body temperature reported as occasional elevated temperature and Covid antibody test result of 32 (units not specified). The patient was advised by two physicians not to get the second dose of the vaccine. Patient states that most of the symptoms has subsided now, aside from the recurring fatigue.   This case was linked to MOD-2021-049648 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 02-Jul-2021: Follow up report was received, and include information for lab, treatment medication and new events.