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.
Levels of antibody-neutralizing virus in different immunized tissues at 60 days after secondary immunization. (A) Changes in antibody neutralization levels in serum at different time periods; (B) changes in antibody neutralization levels in skin mucosa at different time periods; (C) changes in antibody neutralization levels in intestinal mucosa at different time periods. Data are presented as mean ± SD.
