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.
Reversion and complementation analysis of the Us9 null spread defect. The spread patterns of virus following intraocular injection of animals with PRV Becker (Be), PRV 161, PRV 161R, and a 1:1 (vol/vol) mixed population of PRV 161 and PRV 91 are shown. The infected tissue was processed and analyzed as described in the legend for Fig. 3. Abbreviations are as used for Fig. 3.
