To the Editor.—
In answering a question of Dr. R. W. Thaler of Boston, Dr. Goldstein of Atlanta stated that "there are no data available on the risks of revaccination in individuals who have recovered from postvaccinal encephalitis (224:139, 1973). Some data have been published by F. Puntigam and J. Daimer (Osterr Z Kinderheilk Kinderfürsorge 4:6, 1950) on 15 patients who recovered from postvaccinal encephalitis and, being revaccinated in the Austrian Army between 7 to 15 years following the malady, did not show untoward reactions. We have vaccinated at least ten travelers with previous postvaccinal encephalitis going abroad, after an interval of 4 and 12 years following the disease. In these cases a preimmunization with killed smallpox vaccine was performed eight days before. Unusual reactions were not recorded.