[Fatal case of co-infection with yellow fever virus and SARS-CoV2 during the 2020 Covid-19 pandemic in French Guiana].

The yellow fever virus (YFV), recently renamed Orthoflavivirus flavi, is an arbovirus of the Flaviviridae family and Orthoflavivirus genus endemic in South America and Tropical Africa. Brazil experienced an epidemic of unprecedented magnitude between 2016 and 2018. The resurgence of new cases in French Guiana in recent years has rekindled interest in the disease. In December 2019, the global pandemic of Covid-19 began and rapidly reached South America. The first cases were reported in French Guiana in March 2020. Many tropical diseases circulate in the region and the possibility of co-infections is therefore high. Here, we report the first case of YF virus-SARS-CoV2 co-infection in a 14-year-old French Amerindian boy who died within nine days. He had received a single dose of YF vaccine in childhood.