Association of COVID‐19 with skin diseases and relevant biologics: a cross‐sectional study using nationwide claim data in South Korea*

As the coronavirus disease 2019 (COVID-19) pandemic has spread, information about COVID-19 and skin disease or related biologics is still lacking.To identify the association between COVID-19 and skin diseases or biologics.A nationwide claim dataset relevant to COVID-19 in South Korea was analysed. This dataset included insurance claim data before and during COVID-19 treatment and clinical outcomes. Claim data related to skin diseases and...