The British medical journal The Lancet yesterday offered a mea culpa of sorts for its role in launching a global vaccine scare. Its regrets come about 12 years too late.

The journal finally issued a full retraction of a study it ran in 1998 linking measles-mumps-rubella vaccines to autism. The paper, with Dr. Andrew Wakefield as lead author, sent British parents fleeing from inoculations and fed U.S. alarm over preservatives in vaccines.

Even...