Received Oct 24, 2025
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| COVID19 | COVID19 (COVID19 (MODERNA MNEXSPIKE)) | MODERNA | UNK | — | IM |
my arm is still very swollen; It's like a huge lump/just this one area where I got the injection; I have the Covid arm; This spontaneous case was reported by a consumer and describes the occurrence of PERIPHERAL SWELLING (my arm is still very swollen), VACCINATION SITE MASS (It's like a huge lump/just this one area where I got the injection) and VACCINATION SITE REACTION (I have the Covid arm) in a 69-year-old female patient who received mRNA-1283 (MNEXSPIKE PFS) for COVID-19 prophylaxis. Previously administered products included for Product used for unknown indication: INFLUENZA VACCINE. Past adverse reactions to the above products included No adverse effect with INFLUENZA VACCINE. On 03-Oct-2025, the patient received dose of mRNA-1283 (MNEXSPIKE PFS) (Intramuscular use) 1 dosage form. In October 2025, the patient experienced PERIPHERAL SWELLING (my arm is still very swollen), VACCINATION SITE MASS (It's like a huge lump/just this one area where I got the injection) and VACCINATION SITE REACTION (I have the Covid arm). At the time of the report, PERIPHERAL SWELLING (my arm is still very swollen), VACCINATION SITE MASS (It's like a huge lump/just this one area where I got the injection) and VACCINATION SITE REACTION (I have the Covid arm) had not resolved. No relevant medical history. No concomitant medication was reported. Patient had gotten the latest COVID shot, and her arm was still very swollen. It looks like patient was working out with that muscle. This was just very odd. Patient usually have a pretty big reaction. Patient have taken the Moderna every time and this one was much better, the reaction. Patient had the Covid arm. Patient had this still two weeks later. It's like a huge lump. So, it looked like patient was almost like a bodybuilder in a way, and patient was not. Patient was a very tiny little person in just this one area where she got the injection. It was unknown if the patient experienced any additional symptoms/events. No treatment medication was reported. Causality was not reported. This case was linked to MOD-2025-790385 (Patient Link).