Table II.

Distribution of Respiratory Viruses Including Mixed Infections Over the Three Winter Sampling Periods

Virus	No. of positive cases [%]
	2005–2006			2006–2007			2007–2008
	Nov.–Dec. (na = 86)	Jan.–Feb. (n = 218)	Mar.–May (n = 88)	Nov.–Dec. (n = 25)	Jan.–Feb. (n = 304)	Mar.–May (n = 48)	Nov.–Dec. (n = 39)	Jan.–Feb. (n = 324)	Mar.–May (n = 140)
Influenza	11 [12.8]	41 [18.8]	17 [19.3]	3 [12.0]	157 [51.6]	21 [43.8]	1 [2.6]	103 [31.8]	33 [23.6]
HRSV	3 [3.5]	19 [8.7]	6 [6.8]	2 [8.0]	41 [13.5]	5 [10.4]	3 [7.7]	55 [17.0]	21 [15.0]
HRV	7 [8.1]	5 [2.3]	5 [5.7]	11 [44.0]	51 [16.8]	3 [6.3]	7 [17.9]	42 [13.0]	29 [20.7]
HAdV	11 [12.8]	26 [11.9]	11 [12.5]	3 [12.0]	9 [3.0]	2 [4.2]	7 [17.9]	19 [5.9]	7 [5.0]
HMPV	0 [0.0]	8 [3.7]	4 [4.5]	0 [0.0]	3 [1.0]	0 [0.0]	0 [0.0]	17 [5.2]	12 [8.6]
HPIV	7 [8.1]	6 [2.8]	1 [1.1]	2 [8.0]	9 [3.0]	0 [0.0]	7 [17.9]	11 [3.4]	4 [2.9]
HBoV	11 [12.8]	11 [5.0]	6 [6.8]	3 [12.0]	14 [4.6]	0 [0.0]	2 [5.1]	23 [7.1]	11 [7.9]
HCoV	1 [1.2]	7 [3.2]	4 [4.5]	1 [4.0]	4 [1.3]	2 [4.2]	0 [0.0]	7 [2.2]	4 [2.9]

HRSV, human respiratory syncytial virus; HRV, human rhinovirus; HAdV, human adenovirus; HMPV, human metapneumovirus; HPIV, human parainfluenza virus; HBoV, human bocavirus; HCoV, human coronavirus.

^aTotal number of samples analyzed.