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- Potential recurrence of COVID-19 in a healthcare professional: SARS-CoV-2 genome sequencing confirms contagiousness after re-positivityPublication . Correia, Ana M.; Borges, Vítor; Isidro, Joana; Lima, Ana R.; Fernandes, Alberto; Godinho, Maria Leonor; Duarte, Sílvia; Ferrão, José; Vieira, Luís; Gomes, João P.Re-positivity of SARS-CoV-2 tests is widely reported, raising discussion about guidance for patient discharge and ending isolation. The unsuccessful recovery of replication-competent virus and/or absence of secondary cases has suggested that re-positive patients are not contagious. This study reports SARS-CoV-2 re-positivity in a healthcare professional 16 days after three negative tests, with viral genome sequencing supporting contagiousness leading to secondary cases.