Contribution to Authorship
TDC, PBA, JMB, and EL designed the study. TDC applied for the ethical approval. JM and VH recruited the participants and collected the samples. LR was responsible for analysis of anti-SARS-CoV-2 in blood samples. CJ was responsible for the initial handling of blood samples. AA was responsible for providing baseline data on participants as well as non-participants. TEO performed the pathological examination. LN and MF were responsible for analysis of swabs for SARS-CoV-2. JM and VH wrote the first draft of the manuscript with subsequent amendments by all authors, who also approved the final version.