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.
NAb titer levels measured with the Mx1 induction assay. Patient numbers are based on those in Table 1. Numbers in parenthesis are NAb classes (1: NAb negative; 2: NAb medium; 3: NAb high).
