The firm area is now red; itching on the site, really intense like a mosquito bite; sore below the injection site; swelling below the injection site, like expanded area, kinda firm and elevated; This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION SITE PAIN (sore below the injection site), VACCINATION SITE SWELLING (swelling below the injection site, like expanded area, kinda firm and elevated), VACCINATION SITE PRURITUS (itching on the site, really intense like a mosquito bite) and VACCINATION SITE ERYTHEMA (The firm area is now red) in a 46-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 025J20-2A) for COVID-19 vaccination.     The patient's past medical history included No adverse event (No adverse event).    On 24-Dec-2020, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 24-Dec-2020, the patient experienced VACCINATION SITE PAIN (sore below the injection site) and VACCINATION SITE SWELLING (swelling below the injection site, like expanded area, kinda firm and elevated). On 31-Dec-2020, the patient experienced VACCINATION SITE PRURITUS (itching on the site, really intense like a mosquito bite). On 07-Jan-2021, the patient experienced VACCINATION SITE ERYTHEMA (The firm area is now red). On 27-Dec-2020, VACCINATION SITE PAIN (sore below the injection site) and VACCINATION SITE SWELLING (swelling below the injection site, like expanded area, kinda firm and elevated) had resolved. At the time of the report, VACCINATION SITE PRURITUS (itching on the site, really intense like a mosquito bite) and VACCINATION SITE ERYTHEMA (The firm area is now red) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown. This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION SITE PAIN (sore below the injection site), VACCINATION SITE SWELLING (swelling below the injection site, like expanded area, kinda firm and elevated), VACCINATION SITE PRURITUS (itching on the site, really intense like a mosquito bite) and VACCINATION SITE ERYTHEMA (The firm area is now red) in a 46-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 025J20-2A) for COVID-19 vaccination.     The patient's past medical history included No adverse event (No adverse event).    On 24-Dec-2020, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 24-Dec-2020, the patient experienced VACCINATION SITE PAIN (sore below the injection site) and VACCINATION SITE SWELLING (swelling below the injection site, like expanded area, kinda firm and elevated). On 31-Dec-2020, the patient experienced VACCINATION SITE PRURITUS (itching on the site, really intense like a mosquito bite). On 07-Jan-2021, the patient experienced VACCINATION SITE ERYTHEMA (The firm area is now red). On 27-Dec-2020, VACCINATION SITE PAIN (sore below the injection site) and VACCINATION SITE SWELLING (swelling below the injection site, like expanded area, kinda firm and elevated) had resolved. At the time of the report, VACCINATION SITE PRURITUS (itching on the site, really intense like a mosquito bite) and VACCINATION SITE ERYTHEMA (The firm area is now red) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       Concomitant product use was not provided by the reporter.  No treatment information was provided.  Company comment: Based on the current available information and temporal association between the use of the product and the start date of these events, a causal relationship cannot be excluded.; Reporter's Comments: Based on the current available information and temporal association between the use of the product and the start date of these events, a causal relationship cannot be excluded.