Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Distribution of P/N ratios illustrate cut-off values for ELISA assays: Kernel density estimates of the P/N ratios for the ELISA assays. Panels (a–c) illustrate RBD, Spike, and NP ratios, respectively. The RBD and spike panels show the secondary training data, while the nucleocapsid panel shows the dataset of interest. Training assay data results are those of the neutralization assay for RBD and spike and the Abbott results for the nucleocapsid panel.
