Volume 9, Number 5—May 2003
Research
Seasonal Patterns of Invasive Pneumococcal Disease
Figure 2

Figure 2. Weekly rates of invasive pneumococcal disease in the United States, January 1996–December 1998. Weekly numbers of cases from active surveillance areas in California, Connecticut, Georgia, Maryland, Minnesota, Oregon, and Tennessee were divided by the population under surveillance that year and multiplied by 52 to give annualized weekly rates.
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