About These Tables
National Notifiable Diseases Surveillance System (NNDSS) Tables
Data for selected nationally notifiable diseases reported by the 50 states, New York City, the
District of Columbia, and the U.S. territories are collated and published weekly in the Morbidity
and Mortality Weekly Report (MMWR). Cases reported by state health departments
to CDC for weekly publication are provisional because of ongoing revision of information
and delayed reporting. Case counts in these query tables are presented as they were
published in the MMWR . Therefore, numbers listed in later MMWR weeks may
reflect changes made to these counts as additional information becomes available.
As part of its national influenza surveillance effort, CDC receives weekly mortality
reports from 122 cities and metropolitan areas in the United States within 2-3 weeks from
the date of death. These reports summarize the total number of deaths occurring in these
cities/areas each week, as well as the number attributed to pneumonia and influenza. Data
are published weekly in Table IV of the Morbidity and Mortality Weekly Report (MMWR).