All vaccines that are used in the United States are made by growing viruses in eggs, which can be a very slow process. Two faster methods are nearing approval by the Food and Drug Administration. While processes may differ slightly from company to company, here are the basic steps in those three methods:
Sources: Centers for Disease Control and Prevention, MedImmune, Novartis AG, Protein Sciences Corp. | Graphic: Bonnie Berkowitz, Brenna Maloney and Laura Stanton - The Washington Post
Vaccine system remains antiquated Article | After a lethal bird flu virus emerged in Asia, U.S. officials launched an intense effort to build new defenses against a pandemic, including replacing an antiquated vaccine system, which depends on millions of chicken eggs.