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.
Dendrogram of sequence relatedness in the 5′ UTR of four representative poliovirus type 1 strains isolated in Albania, environmental strain Lana C (3), strains isolated in Pakistan in 1995, wild poliovirus type 1 strain Mahoney, and a vaccine reference strain (accession no. gi/61252/emb7V01149/POLIO1B and gi/61257/emb7V01150/POLIOS1, respectively). The Albanian virus strains were selected by place and time of isolation.
