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“COVID arm:” Delayed local hypersensitivity reaction to ChAdOx1 nCoV-19 coronavirus vaccine
*Corresponding author: Anupam Das, Department of Dermatology, KPC Medical College and Hospital, Kolkata, West Bengal, India. anupamdasdr@gmail.com
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Received: ,
Accepted: ,
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].
- (a) Tense bulla on the top of erythematous plaque on the left arm (Day 2 after the first dose of vaccination), (b) Scab formation on the injection site (Day 12 after the first dose of vaccination).
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.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent.
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Conflicts of interest
There are no conflicts of interest.
