In the Commentary entitled "New Developments With Pertussis Vaccines" by Neal A. Halsey (Pediatrics, 1995;96:970-971), a correction is needed. On page 970, second column, line 13, the sentence should be reworded so that it now reads as follows:

In the European trials, no fourth dose was administered at 12 to 18 months of age as is the recommendation in the United States.

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