Declaration of competing interests
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Acknowledgments : Authors are thankful to Dra Lucia Vicenta Cavallaro for support on virology aspects related to COVID-19. We are also grateful to Biobanco de Enfermedades Infecciosas Colección COVID19 working group: Yesica Longueira, Horacio Salomon and Gabriela Turk for collecting and providing the sera. This work was supported by the Agencia Nacional de Promoción de la Investigación, el Desarrollo Tecnológico y la Innovación (ANPCyT) (IP-COVID-19-209). SSB, AT, SCV, MGL, OT, AMT, FJW, LGA, MF, SNV and MVM are career researchers of the Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET). IS, GJMC, JMB, JMM are research fellows of CONICET. ABS is research fellow of UBA. JIM is research fellow of ANPCyT.