1.
Braz. j. med. biol. res
;
30(6): 695-703, jun. 1997.
Article
in English
| LILACS
| ID: lil-194168
ABSTRACT
Oral poliovirus vaccine (OPV) developed by A. Sabin has been effectively used to control poliomyelitis in Brazil, and the last case with the isolation of a wild poliovirus strain occourred in March 1989. Although the vaccine controlled the circulation ...