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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 <5 years, who are the primary focus of CII. Data in the table are reported through the National Electronic Telecommunications System for Surveillance (NETSS).
Table_1
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Number of reported cases of nationally notifiable diseases preventable by routine
childhood vaccination -- United States, January-March 1997 and 1996-1997 *
=====================================================================================================
                                                                       No. cases among
                                No. cases,        Total cases       children aged <5 years +
                                 January-        January-March           January-March
                                   March        ---------------     ------------------------
Disease                            1997         1996       1997         1996        1997
--------------------------------------------------------------------------------------------
Congenital rubella
  syndrome                            2            1          2            1           2
Diphtheria                            1            1          1            0           0
Haemophilus influenzae &            256          301        256           71          53
Hepatitis B @                      1865         2111       1865           14          59
Measles                              19           67         19            9          12
Mumps                               134          152        134           26          24
Pertussis                          1100          662       1100          296         444
Poliomyelitis, paralytic **           0            3          0            2           0
Rubella                               8           39          8            2           4
Tetanus                               9            3          9            0           0
--------------------------------------------------------------------------------------------
 * Data for 1996 and 1997 are provisional.
 + For 1996 and 1997, age data were available for >=95% of cases, except for 1996 age data for
   measles, which were available for 91% of cases.
& Invasive disease; H. influenzae serotype is not routinely reported to the National Notifiable
   Diseases Surveillance System. Of 53 cases among children aged <5 years, serotype was
   reported for 26 cases, and of those, 11 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.
** Two suspected cases with onset in 1996 and one with onset in 1995 remain under
   investigation.
=====================================================================================================

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