TY  - GEN
AU  - Gonçalves,Guilherme
AU  - Santos,Luís Almeida
AU  - Sarmento,António
AU  - Rocha,Graça
AU  - Valente,Paula
TI  - [Portugal and Europe are poliomyelitis free]
SN  - 0870-399X
PY  - 2003///0829
KW  - Acute Disease
KW  - Europe
KW  - epidemiology
KW  - Humans
KW  - Poliomyelitis
KW  - Poliovirus
KW  - isolation & purification
KW  - Portugal
KW  - Vaccination
N1  - Publication Type: English Abstract; Journal Article
ER  -