TABLE 1.

RSV clinical strain antigenic subgroups and clades

Years	No. of isolates/RSV season for clade:
	A (n = 142)		B (n = 67)
	GA2 (n = 54)	GA5 (n = 88)	GB3
2004–2005	2	0	25
2005–2006	13	48	17
2006–2007	21	36	9
2007–2008	18	4	16