FIGURE 1.
Distribution of S and N assay values; the dashed lines indicate the assay positive cut‐off values. The positive cut‐off values are >0.8 for the S assay and >1.0 for the N
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.