Finally, Zhang et al. (29) used 15 amino acid peptides overlapping by 5 aa covering the whole SARS-CoV-2 proteome, plus full-length N and E as well as 5 truncated forms of S to map IgM and IgG responses of acute COVID-19 patients (median 4 days post-onset of symptoms). Here, CD40LG is linked to COVID-19.