Figure 6-8. The response to an initial infection occurs in three phases.

Figure 6-8The response to an initial infection occurs in three phases

Document signed on December 9, 1979, by members of the World Health Organization Global Commission, certifying that smallpox had been eradicated. (From Fenner F, Henderson DA, Arita I, et al. Smallpox and Its Eradication. Geneva, World Health Organization, 1988, frontispiece.)

From: Public Health

Cover of Vaccines
Vaccines. 3rd edition.
Plotkin SA, Orenstein WA, editors.
Philadelphia: Saunders; 1999.
Copyright © 1999, W.B. Saunders Company.

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