in minnesota , the relative risk for invasive disease in the first week after immunization was 6.2 ( 95 % ci , 0.6 to 45.9 ) , and the results of a study conducted by the centers for disease control in six areas of the united states revealed a 1.8-fold ( 95 % ci , 0.3 to 10.2 ) increase in the occurrence of invasive disease caused by h influenzae type b in the first week after immunization .
C0026183
minnesota
C0041703
united states