To prevent flu epidemics, the US implemented a policy of comprehensive vaccinations in 1976. Yet although no major epidemics took place, there were many reports of side effects from the vaccinations, and compensation claims led to years of litigation.
1976 年，美國為了防堵豬流行性感冒大流行，曾採取全面施打疫苗的措施，沒想到大流感沒發生，施打疫苗造成副作用的傳聞卻不斷，還因此纏訟、索賠數年。