gets side effects with Moderna Covid-19 vaccine/had Covid arm/rash, redness and swelling of the arm, for 3 weeks; fully red/the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks; the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks; the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks; This spontaneous case was reported by a pharmacist and describes the occurrence of IMMUNISATION REACTION (gets side effects with Moderna Covid-19 vaccine/had Covid arm/rash, redness and swelling of the arm, for 3 weeks), ERYTHEMA (fully red/the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks), PERIPHERAL SWELLING (the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks) and INDURATION (the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks) in a female patient of an unknown age who received mRNA-1273 (Spikevax) for COVID-19 prophylaxis.     No Medical History information was reported.    On an unknown date, the patient received first dose of mRNA-1273 (Spikevax) (unknown route) 1 dosage form. On an unknown date, the patient experienced IMMUNISATION REACTION (gets side effects with Moderna Covid-19 vaccine/had Covid arm/rash, redness and swelling of the arm, for 3 weeks), ERYTHEMA (fully red/the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks), PERIPHERAL SWELLING (the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks) and INDURATION (the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks). At the time of the report, IMMUNISATION REACTION (gets side effects with Moderna Covid-19 vaccine/had Covid arm/rash, redness and swelling of the arm, for 3 weeks), ERYTHEMA (fully red/the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks), PERIPHERAL SWELLING (the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks) and INDURATION (the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks) had resolved.        The action taken with mRNA-1273 (Spikevax) (Unknown) was unknown.   For mRNA-1273 (Spikevax) (Unknown), the reporter considered IMMUNISATION REACTION (gets side effects with Moderna Covid-19 vaccine/had Covid arm/rash, redness and swelling of the arm, for 3 weeks) to be related. No further causality assessments were provided for ERYTHEMA (fully red/the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks), PERIPHERAL SWELLING (the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks) and INDURATION (the arm was very red, it was red swollen, the whole arm turns red and became swollen and hard for about three weeks).    No concomitant medications were reported by the reporter.  The reporter asked if the patient would be good if the patient would receive a second dose with Pfizer COVID-19 vaccine after experiencing side effects like COVID arm/rash, redness and swelling with the first dose of Moderna Covid-19 vaccine.  The patient was informed by the physician that the patient had a COVID arm from Moderna Covid-19 vaccine and was recommended to get a second dose with Pfizer-Biontech Covid-19 vaccine.  No treatment information was provided.   Reporter did not allow further contact