Introduction Data from the USA reveal disparities in hospitalization and mortality from coronavirus disease 2019 (COVID-19). Social determinants of health (SDoH) could account for disparities in disease incidence and outcomes. We investigated the association between zip code racial composition and COVID-19 incidence and case fatality in Oakland County, MI. Methods We conducted an ecological study using publicly available data on COVID-19 in 70 zip codes in Oakland County, MI. We obtained demographic surrogate markers of SDoH by zip code from the US Census Bureau website. Using negative binomial regression models, we investigated the association between the percentage of Blacks in each zip code and COVID-19 incidence and case fatality, including markers of SDoH as potential confounders. Results Reported COVID-19 cases ranged from 13.2 to 255.2 per 10,000 population. Each percentage increase in Blacks within a zip code was associated with a 3% increase in COVID-19 cases (95% CI: 1.02 to 1.04, p ≤ 0.0001), and this remained significant after adjusting for income or poverty level, number of persons per household, mode of transportation, age, and level of education (incidence rate ratio: 1.02, 95% CI: 1.01 to 1.03, p ≤ 0.0001). Zip codes with a higher percentage of Blacks also experienced a faster increase in COVID-19 rates from April 3 to May 16. However, the proportion of Blacks in a zip code was not associated with case fatality. Conclusion Zip codes with larger Black populations were disproportionately affected by COVID-19. Supplementary Information The online version contains supplementary material available at 10.1007/s40615-020-00909-1.

We report a 64-year-old man presenting with cutaneous leukocytoclastic vasculitis, the underlying etiology of which was established as hepatitis C infection with associated cryoglobulinemia. This pathophysiologic state presented clinically as recurrent cutaneous vasculitic eruptions with the absence of any other clinical manifestations except for mild ankle swelling and weakness. This case clearly relates the need to consider hepatitis C as a potential etiologic factor in all patients with cutaneous vasculitis, and we suggest that viral hepatitis screening should be done routinely in all patients presenting with cutaneous vasculitis.