Serum sickness-like reaction following an administration of the first dose of inactivated COVID19 vaccine

Numerous vaccine-related adverse reactions have emerge amidst an emergency rollout of COVID-19 vaccines. The nature and incidence of these reactions vary according to the type of vaccine. An inactivated COVID19 vaccine (CoronaVac) is widely distributed in Thailand and several other countries. It has been considered relatively safe, with the most commonly encountered side effects being injection site reactions, fever, fatigue, diarrhea, and muscle pain.1 Regarding cutaneous side effects, discoloration at the injection site and pruritus have been reported from vaccine trials.