Authorship details

MPH, DB and AE developed the RBD immunoassay; MPH implemented and conducted all immunoassays. PB and FSR implemented and conducted the RT-PCR. HRJ and BW performed virus neutralization assays. MN developed the study design, the protocol, and the analysis plan, analyzed, interpreted the data, and wrote the manuscript. TF and CL developed the biobanking solutions. OE provided clinical data. LD and JM included patients. MF and FSR provided infrastructure, contributed to study design, and intellectually reviewed the manuscript. MPH, AE, BW, MF, and CL contributed to study design, interpretation of the results and drafting of the manuscript. All authors intellectually reviewed the manuscript. The corresponding author attests that all listed authors meet authorship criteria and that no others meeting the criteria have been omitted. The corresponding author affirms that the manuscript is an honest, accurate, and transparent account of the study being reported; no important aspects of the study have been omitted, and discrepancies from the study as originally planned have been explained.