A study presented this week at the American Academy of Neurology’s 61st annual meeting in Seattle supports last year’s blog cautioning against making cause-effect conclusions from anecdotal reports and tragic patient stories linking the HPV vaccine (Gardasil) with Guillain-Barré syndrome (GBS).

In the report, researchers examined data from the Vaccine Adverse Event Reporting System (VAERS) in which 36 cases of GBS were reported to have occurred after vaccination in the United States from 2006 to 2008. The University of Medicine and Dentistry in New Jersey study reports that the disorder occurred within six weeks after vaccination in 75 percent of the people, and in 60 percent, HPV was the only vaccine administered at the time (the remaining 40 percent received the HPV vaccine along with others).