Table 3.

Emergence of Resistance to Neuraminidase Inhibitors in Children With Laboratory-Confirmed A/H1N1pdm09 and A/H3N2 Influenza Virus at Baseline

Influenza (Sub-)Type a	Age Group
	<6 Months	6 Months–1 Year	1–3 Years	3–5 Years	5–10 Years	10–13 Years
		n = 10	n = 11	n = 301	n = 372	n = 605	n = 209
A/H1N1pdm09	2/4 (50.0)	2/7 (28.6)	15/151 (9.9)	9/158 (5.7)	6/270 (2.2)	0/93 (0.0)
A/H3N2	0/6 (0.0)	0/4 (0.0)	5/150 (3.3)	6/214 (2.8)	4/335 (1.2)	0/116 (0.0)

Data are the fraction of resistant (%).

^aData from children infected with influenza B are not shown, because no resistance mutations were detected in these patients.