Less than 50 cases is "lots of folks" unless you count the number immunized in 1976.

From the CDC:

In 1976 there was a small increased risk of GBS following vaccination with an influenza vaccine made to protect against a swine flu virus. The increased risk was approximately 1 additional case of GBS per 100,000 people who got the swine flu vaccine. The Institute of Medicine (IOM) conducted a thorough scientific review of this issue in 2003 and concluded that people who received the 1976 swine influenza vaccine had an increased risk for developing GBS. Scientists have multiple theories on why this increased risk may have occurred, but the exact reason for this association remains unknown.



If your lifestyle puts you in contact with a lot of folks, including friend or family with compromised immune systems (cancer patients, elderly, infirm) you should consider the annual flu shot.