The CDC monitors for Guillain-Barré syndrome each flu season. The agency says the data on an association between seasonal influenza vaccine and the illness varied from season to season. When there has been an increased risk, it has consistently been in the range of one or two additional cases per 1 million flu vaccine doses administered. Studies also suggest it is more likely that a person will get Guillain-Barré after getting the flu than after vaccination, according to the CDC.

Source: Washington Post July 12, 2021 17:38 UTC