Reaction	Amount of time after vaccine	New or preexisting rash	Type of vaccine	Treatment Used
Pernio-like lesions	24 hours	New	Pfizer	N/A
“COVID arm”	3-12 hours	New	Moderna	Oral antihistamines, topical corticosteroids
Erythema Multiforme Minor	12 hours	preexisting	Pfizer	Topical clobetasol
	5 days	New	CoronaVac	Topical corticosteroids, oral antihistamines
	6 days	New	Pfizer	Topical corticosteroids
Nevocentric Erythema Multiforme	3 days	New	Pfizer	Cetirizine 10mg for 2 weeks and skin emollients
Rowell’s Syndrome	1 day	New	Pfizer	prednisolone
Varicella Zoster Virus Reactivation	5.8 days	Preexisting	mRNA or AstraZeneca	Valacyclovir or acyclovir
Psoriasis	4 days	Preexisting	CoronaVac	Infliximab 5mg/kg
	3 weeks	New	Covishield	Topical steroids and acitretin 20mg
	1 week	Preexisting	Covishield	Apremilast, antihistamines, topical emollients
	10 days	New	Covishield	Apremilast, antihistamines, topical emollients
	5 days	Preexisting	Pfizer	Infliximab 5mg/kg, cyclosporine 4mg/kg, IV fluids
	10 days	Preexisting	Moderna	Topical steroids, topical calcipotriol
	6 days	New	Moderna	Topical steroids, topical calcipotriol
Vitiligo	1 week	New	Pfizer	Tacrolimus
Vitiligo	Several days	New	Moderna	Topical calcineurin inhibitor, phototherapy
Lichen Planus	5 days	New	Pfizer	Topical and systemic corticosteroids
	48 hours	Preexisting	Pfizer	High-potency topical corticosteroids
	1 week	New	Pfizer	N/A
Bullous Pemphigoid	7 days	new	mRNA	Topical corticosteroids, doxycycline, nicotinamide, and systemic corticosteroids
	3 days	preexisting	Moderna	Oral prednisone
	2 weeks	preexisting	Moderna	Oral prednisone
	3 days	preexisting	Pfizer	Oral prednisone
Pemphigus Vulgaris	3 days	Preexisting	Moderna	Oral prednisone and mycophenolate mofetil
	3 days	Preexisting	Pfizer	Oral prednisone
	5 days	New	Pfizer	Oral prednisone, azathioprine
Subcorneal pustular dermatosis	8 days	New	Moderna	Prednisone 50mg, triamicinolone acetonide 0.1% ointment
Undifferentiated bullous eruption	24 hours	New	Moderna	Oral prednisone
Sweet Syndrome	4 days	New	Covishield	Methylprednisone succinate 125mg infusion, oral prednisone
Darier’s Disease	2 days	Preexisting	Covishield	Topical corticosteroids, salicylic acid, oral isotretinoin
Stevens-Johnson Syndrome	3 days	New	Covishield	oral ciclosporin 300 mg
Leukocytoclastic vasculitis	2 days	Preexisting	Pfizer	Oral prednisone
Leukocytoclastic vasculitis	3 days	New	Inactivated	Topical mometasone furoate
Pityriasis rubra pilaris	10 days	New	AstraZeneca	Isotretinoin 30mg

Top Countries
US	16
SG	6
CA	3
DE	2
GB	2
IN	2
BD	1
MK	1
n/a	1

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