This spontaneous case was reported by a consumer and describes the occurrence of ARTHRITIS (constant pain in her whole body and it was so bad that she wished she could die/ constant whole body so bad and wish she could die/not steady on her feet/could not walk straight anymore/cannot get up from her chair/ arthritis) in a female patient of an unknown age who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 007B21A) for COVID-19 prophylaxis. The patient's past medical history included GERD, Diverticulitis and Acid reflux (esophageal). Concurrent medical conditions included Drug allergy (Allergic to Lipitor.), Drug allergy (Allergic to Niacin.), Drug allergy (Allergic to Erythromycin.), Rheumatoid arthritis, Polio and Epilepsy. On 23-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On an unknown date, the patient experienced ARTHRITIS (constant pain in her whole body and it was so bad that she wished she could die/ constant whole body so bad and wish she could die/not steady on her feet/could not walk straight anymore/cannot get up from her chair/ arthritis). At the time of the report, ARTHRITIS (constant pain in her whole body and it was so bad that she wished she could die/ constant whole body so bad and wish she could die/not steady on her feet/could not walk straight anymore/cannot get up from her chair/ arthritis) had not resolved. The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown. For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter considered ARTHRITIS (constant pain in her whole body and it was so bad that she wished she could die/ constant whole body so bad and wish she could die/not steady on her feet/could not walk straight anymore/cannot get up from her chair/ arthritis) to be not related. No concomitant medication was reported. It was reported that 2 weeks after getting the 1st dose of the Moderna Covid-10 vaccine. She said that she had constant pain in her whole body and it was so bad that she wished she could die. She couldn't get up from her chair and was not steady on her feet. She could not walk straight anymore. She consulted with her healthcare provider and was told that this was due to her arthritis and aging and not due to the vaccine. No treatment medication was reported. Company comment-This spontaneous case concerns a female patient of unknown age with relevant medical history of Rheumatoid arthritis reported, who experienced the unexpected, non-serious event of Arthritis about 2 weeks after first dose of mRNA-1273 vaccination. It was reported that 2 weeks after vaccination, she had constant severe pain in her whole body, she couldn't get up from her chair and was not steady on her feet. She could not walk straight anymore. She consulted with her healthcare provider and was told that this was due to her arthritis and aging and not due to the vaccine. No treatment medication was reported. No further clinical information was provided for medical reviewing. Outcome of the event was not resolved at the time of report. The relevant medical history could be confounder to the event. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report. This case was linked to MOD-2021-295481 (Patient Link).; Sender's Comments: This spontaneous case concerns a female patient of unknown age with relevant medical history of Rheumatoid arthritis reported, who experienced the unexpected, non-serious event of Arthritis about 2 weeks after first dose of mRNA-1273 vaccination. It was reported that 2 weeks after vaccination, she had constant severe pain in her whole body, she couldn't get up from her chair and was not steady on her feet. She could not walk straight anymore. She consulted with her healthcare provider and was told that this was due to her arthritis and aging and not due to the vaccine. No treatment medication was reported. No further clinical information was provided for medical reviewing. Outcome of the event was not resolved at the time of report. The relevant medical history could be confounder to the event. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.