It is well known that the diagnosis for the new coronavirus is twofold; RT-PCR to check for the infection and antibody testing to check for the infection history.
Antibody testing can not be used for early diagnosis of SARS-CoV-2, because it take more than a week before the antibody rises up. However, by focusing on serum nucleocapsid protein of SARS-CoV-2, it seems that the infection of the new coronavirus can be detected even early before the antibody (IgG) rises up.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7498565/
The ROC curve showed that AUC was 0.9756 (95% CI), sensitivity was 92%, and specificity was 96.8%. The cut-off value of the capsid protein was 1.85 p
g/mL.
Wouldn’t it be a great achievement?