“COVID arm:” Delayed local hypersensitivity reaction to ChAdOx1 nCoV-19 coronavirus vaccine
How to cite this article: Mandal RK, Das A. “COVID arm:” Delayed local hypersensitivity reaction to ChAdOx1 nCoV-19 coronavirus vaccine. CosmoDerma 2022;2:6.
A 26-year-old lady presented with a low-grade fever, malaise, and a solitary erythematous plaque surmounted by a tense bulla, over the left arm [Figure 1a] She had received the first dose of COVISHIELD vaccine, 2 days before the onset of the lesion. She was diagnosed with a “COVID arm,” a localized delayed-type hypersensitivity reaction to the vaccine. She was prescribed paracetamol 500 mg twice daily for 3 days, and calamine lotion, and the lesion resolved with a scab [Figure 1b].
COVID arm is a delayed hypersensitivity skin reaction that occurs on or around the injection site. Its symptoms show up several days to 1 week or more after the first or second vaccination. Vaccination against COVID-19 is on the rise, and we need to sensitize the mass, that such events should not discourage getting vaccinated.
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