Full text
PDF
. 1967 Oct;1(5):1098–1099. doi: 10.1128/jvi.1.5.1098-1099.1967
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.