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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 year-to-date (provisional data). In addition, the table compares provisional data with final 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 nationally notifiable diseases preventable by routine
childhood vaccination -- United States, April-June 1997 and January-June 1996 and
1997 *
                                                                     No. cases among
                                                 Total cases    children aged <5 years +
                                  No. cases      January-June         January-June
                                 April-June      ------------   ------------------------
Disease                             1997         1996    1997        1996       1997
Congenital rubella syndrome           0             1       2           1          2
Diphtheria                            2             1       5           0          1
Haemophilus influenzae &            318           601     583         145        125
Hepatitis B @                      2267          4673    4252          29        133
Measles                              52           270      71          62         27
Mumps                               190           366     323          75         68
Pertussis                          1268          1891    2452         845       1020
Poliomyelitis paralytic **            0             1       0           1          0
Rubella                              55           127      64          11          8
Tetanus                              12            14      21           0          0
*  Data for 1996 are final. Data for 1997 are provisional.
+  For 1996 and 1997, age data were available for >=96% of cases.
&  Invasive disease; H. influenzae serotype is not routinely reported to the National Notifiable
   Diseases Surveillance System. Of 125 cases among children aged <5 years, serotype was
   reported for 64 cases, and of those, 25 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 vac-
   cination in infants.
** Five cases with onset in 1996 have been confirmed; one case with onset in 1997 is under

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