TY  - JOUR
T1  - Original Antigenic Sin and Pandemic (H1N1) 2009
LA  - en
PB  - Centers for Disease Control and Prevention
YR  - 2010
UL  - http://buscaintegrada.pucsp.br/vufind/Record/pubmed-3086248
AB  - 
KW  - Letters to the Editor
ER  -