TABLE 1.

Clinical courses of the six children studied

Child	Dec. 1997	1998												1999
		Jan.	Feb.	March	April	May	June	July	Aug.	Sept.	Oct.	Nov.	Dec.	Jan.	Feb.	Mar.
1	AOM	AOM	URIa			AOM			AOM			URI	URI	URI		URI
2	URI			URI										URI		URI
3						Eb			AOM			AOM	AOM	AOM		URI
4	AOM		AOM	AOM	AOM	URI	AOM				AOM			URI
5	AOM													URI
6		AOM	AOM	URI					AOM		URI	AOM	AOM	URI

^aURI, upper respiratory infection. 

^bE, entrance into the day care center.