Volume 7, Number 7—June 2001
THEME ISSUE
International Conference on Emerging Infectious Diseases 2000
Conference Presentations
Adaptation of Bordetella pertussis to Vaccination: A Cause for Its Reemergence?
Figure 4

Figure 4. . Temporal trends in frequencies of pertussis toxin and pertactin variants in The Netherlands. Shades of blue=vaccine types; shades of red=nonvaccine types.
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