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.
Clinical Score after intranasal challenge with “Margarita” strain of CSFV. (A) Group 1: Control animals, (B) Group 2: Animals immunized once five days before challenge, (C) Group 3: Animals immunized once three days before challenge, and (D): Group 4: Animals immunized once one day before challenge.
