(Not long ago, for instance, the United States announced it was calling back 800,000 vaccine doses for children under the age of three from Sanofi Pasteur-the vaccine division of the French Sanofi-Aventis Group-because its potency fell 12 % below US government standards.) Yet the epidemic has been moderating throughout the world, which bears witness to the value of disease prevention efforts this time.
雖仍有一些瑕疵（如，日前美國傳出回收 80 萬劑給 3 歲以下幼兒施打的法國賽諾菲巴斯德藥廠疫苗，原因是藥效比標準低了 12 %），但全球疫情的確日漸緩和，可見防疫發揮了絕佳的保護作用。