SARS-CoV2 infection in symptomatic patients: interest of serological tests and predictors of mortality: experience of DR Congo oleh Jean-Robert Makulo, Madone Ndona Mandina, Placide Kingebeni Mbala, Roger Dimosi Wumba, Pierre Zalagile Akilimali, Yannick Mayamba Nlandu, Jerome Ossam Odio, Ben Izizag Bepouka, Murielle Mashi Longokolo, Eric Kasongo Mukenge, Guyguy Kamwiziku, Jonathan Mutombo Muamba, Augustin Luzayadio Longo, Crispin Muanza Lufu, Hervé Letin Keke, Marcel Mambimbi Mbula, Hippolyte Nanituma Situakibanza, Ernest Kiswaya Sumaili, Jean-Marie Ntuma Kayembe