How is the CDC monitoring neurological complications from the H1N1 vaccine as it relates to the risk of Guillain-Barre syndrome? Dr. James Sejvar, neuroepidemiologist in the division of viral and rickettsial diseases at the National Center for Infectious Diseases and the Center for Disease Control and Prevention, outlines for host Dr. Anthony Alessi the historical association between swine flu vaccination and Guillain-Barre syndrome.