Respiratory arrest and was out; Diaphragmatic breathing (could not breathe) was on vent mask that delivered oxygen; Cough that felt like coming from another human being; Felt crappy; Covid red arm; Intermittent Chills; This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of RESPIRATORY ARREST (Respiratory arrest and was out), DYSPNOEA (Diaphragmatic breathing (could not breathe) was on vent mask that delivered oxygen), COUGH (Cough that felt like coming from another human being), FEELING ABNORMAL (Felt crappy), ERYTHEMA (Covid red arm) and CHILLS (Intermittent Chills) in a 78-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 023M20A and 029120A) for COVID-19 vaccination.     Concurrent medical conditions included Hypertension (patient reported hypertension as one of the health issues that she has.).   On 24-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 21-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On an unknown date, the patient experienced RESPIRATORY ARREST (Respiratory arrest and was out) (seriousness criteria hospitalization and medically significant), DYSPNOEA (Diaphragmatic breathing (could not breathe) was on vent mask that delivered oxygen) (seriousness criterion hospitalization), COUGH (Cough that felt like coming from another human being) (seriousness criterion hospitalization), FEELING ABNORMAL (Felt crappy) (seriousness criterion hospitalization), ERYTHEMA (Covid red arm) (seriousness criterion hospitalization) and CHILLS (Intermittent Chills) (seriousness criterion hospitalization). At the time of the report, RESPIRATORY ARREST (Respiratory arrest and was out), DYSPNOEA (Diaphragmatic breathing (could not breathe) was on vent mask that delivered oxygen), COUGH (Cough that felt like coming from another human being), FEELING ABNORMAL (Felt crappy) and ERYTHEMA (Covid red arm) outcome was unknown and CHILLS (Intermittent Chills) was resolving.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In February 2021, Erythema: (abnormal) (big - diameter 3.5 X 6 inches). In February 2021, White blood cell count: 15.5 (High) Her white blood cells were 15.5. In February 2021, X-ray abnormal: (abnormal) lung X-rays were horrible and was "tanked" due to all the diaphragmatic breathing (could not breathe).     The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) and mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown Route) was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   Patient received treatment with 3 antibiotics, steroids and oxygen. Patient reported that they wanted to intubate her and ativan was pushed by RN. Patient was on "vent mask" that delivered oxygen and was in cardiac intensive unit for 4 days and then the doctor decided it was not covid or pneumonia and were looking at cardiac issues.They had to give Narcan to reverse the effects of Ativan. Patient stated in the call that Moderna pushed her off the end of the cliff and reports that prior to this she was healthy and walked daily on regular basis.  Very limited information regarding this events has been provided at this time.  Further information has been requested. The patient's concurrent medical condition of hypertension remains a risk factor and as per the reporter the doctor were looking at cardiac issues as a confounder.   This case was linked to MOD-2021-065711 (Patient Link).; Sender's Comments: Very limited information regarding this events has been provided at this time.  Further information has been requested. The patient's concurrent medical condition of hypertension remains a risk factor and as per the reporter the doctor were looking at cardiac issues as a confounder.