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.
Beta interferon measurement from mouse brain tissue. Samples collected from mice infected intraperitoneally with 1 × 106 PFU of virus 4 days postinfection (p.i.). IFN-β measured using ELISA (n = 3). Detection limit 31 pg/ml (dashed line). nd, not detectable.
