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Quarterly Immunization Table

To track progress toward achieving the goals of the Childhood Immunization Initiative (CII), CDC publishes quarterly a tabular summary Table_1 of the number of cases of nationally notifiable diseases preventable by routine childhood vaccination reported during the previous quarter and the year-to-date (provisional data). In addition, the table compares provisional data with data for the previous year and highlights the number of reported cases among children aged less than 5 years, who are the primary focus of CII. Data in the table are reported through the National Electronic Telecommunications System for Surveillance (NETSS).

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Number of reported cases of diseases preventable by routine childhood vaccination
-- United States, July-September 1998 and January-September 1997-1998*
                                                                              No. cases among
                                     No. cases,       Total cases        children aged <5 years +
                                        July-      January-September        January-September
                                     September     -----------------     ------------------------
Disease                                 1998        1997        1998         1997        1998
Congenital rubella syndrome                0           4           3            4           3
Diphtheria                                 0           4           1            1           0
Haemophilus influenzae&                  219         821         791          168         186
Hepatitis B@                            1994        6900        5952           70          58
Measles                                   23         132          62           49          22
Mumps                                    119         454         364           93          67
Pertussis                               1822        3934        4099         1761        1735
Poliomyelitis, paralytic**                 0           2           1            1           1
Rubella                                   45         140         320           11          24
Tetanus                                   16          33          32            0           1
 * Data for 1997 are final; data for 1998 are provisional.
 + For 1997 and 1998, age data were available for >= 97% cases.
 & Invasive disease; H. influenzae serotype is not routinely reported to the National Notifiable
   Diseases Surveillance System. Of 186 cases among children aged <5 years, serotype was
   reported for 103 cases, and of those, 39 were type b, the only serotype of H. influenzae
   preventable by vaccination.
 @ Because most hepatitis B virus infections among infants and children aged <5 years are
   asymptomatic (although likely to become chronic), acute disease surveillance does not
   reflect the incidence of this problem in this age group or the effectiveness of
   hepatitis B vaccination in infants.
** One case with onset in 1998 and three cases with onset in 1997 have been confirmed. All
   were associated with administration of oral poliovirus vaccine. Two suspected cases remain
   under investigation: one with onset in 1998 and one with onset in 1997.

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