High pre-Delta and early-Omicron SARS-CoV-2 seroprevalence detected in dried blood samples from Kinshasa (D.R. Congo). - de Aguirre PM; Carlos S; Pina-Sánchez M; Mbikayi S; Burgueño E; Tendobi C; Chiva L; Holguín Á; Reina G (Journal of medical virology, 2024)