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Three ways to make a vaccine

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:

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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.

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