而疫苗本身也不无风险，全球性流感疫苗一直与被称为格林·巴利综合症(GBS)的罕见神经疾病有联系。
Vaccination is not without risk in itself, and pandemic flu vaccines have been associated with a rare neurological condition known as Guillain Barre Syndrome (GBS).
他们并不认为还会出现格林·巴利综合症的病例，原因在于今年的甲流病毒和1976年病毒实在相去甚远。
Specifically, they don't anticipate cases of guillain-barre syndrome, because of major differences between this year's swine flu virus and the one that prompted the 1976 vaccine.
至于为什么疫苗会导致格林·巴利综合症，目前无人能完全说清楚，但不可否认的是，超过500人都患上了这一疾病，有25人甚至丢了性命(与此同时，猪流感却并未像人们所担心的那样大肆流行)。
No one is entirely sure why the vaccine caused guillain-barre syndrome, but it affected more than 500 people and killed about 25. (the feared swine flu epidemic never materialized that year.)
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