COVID arm 1 COVID toe 1 COVID-19 1 COVID-19 Vaccines 1 Humans 1 Hypersensitivity 1 RNA vaccine 1 Review 1 Rowell syndrome SARS-CoV-2 1 SARS-CoV-2 vaccine 1 Vaccination 1 ad26.cov2.s vaccine 1 adverse event 1 allergic reaction 1 anaphylaxis 1 atopic dermatitis 1 autoimmune thrombocytopenia 1 chadox 1 comirnaty 1 coronavac 1 coronavirus disease 2019 1 covid arm 1 delayed hypersensitivity 1 delayed inflammatory reaction 1 dizziness 1 drug hypersensitivity 1 drug safety 1 eczema 1 eczematous pigmented purpura 1