Dr. Carlos del Rio : U.S. and Mexico have responded well to swine flu outbreak . I would argue that it is not . He says cross-border cooperation is crucial to successful battle against flu . Score: 6 Del Rio : One factor may be presence of pneumonia in those who died .
Dr. Carlos del Rio : U.S. and Mexico have responded well to swine flu outbreak . He says cross-border cooperation is crucial to successful battle against flu . Score: 6 Del Rio : One factor may be presence of pneumonia in those who died .