Fingernail lunula luminescence in COVID-19 patients: Is it favipiravir-related reaction or a novel manifestation of coronavirus infection.

Coronavirus disease 2019 (COVID-19) pandemic continues to spread across the world since early December 2019. To date, the number of confirmed COVID-19 cases has exceeded 70 million according to WHO data. At the present time, Turkey is among the top countries with highest daily new cases of COVID-19. 1 Although hydroxychloroquine was the first recommended drug in COVID-19 at the beginning of the pandemic, nowadays, favipiravir is the most common recommended drug that is used for COVID-19 in Turkey.