Secular trends in invasive meningococcal disease, Massachusetts, 1988-2011: what happened to invasive disease?


Invasive meningococcal disease (IMD) reported to the Massachusetts Department of Public Health from 1988 to 2011 was reviewed. The average annual incidence of IMD/100 000 decreased from 1·57 [95% confidence interval (CI) 1·42-1·73] for 1988-1991 to 0·22 (95% CI 0·17-0·29) for 2008-2011. The pattern of decreasing incidence over time differed by age group… (More)
DOI: 10.1017/S0950268814000259

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