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. 2017 Aug 10;10:379. doi: 10.1186/s13104-017-2720-8

Table 2.

Seropositivity prevalences for influenza A and B virus-specific IgG antibodies among children in various nations

Age (years)	Influenza A virus			Influenza B virus
Age (years)	Germany 2008–2011 (%) [7]	Netherlands 2006–2007 (%) [8]	This study 2014–2015 (%)	Germany 2008–2010 (%) [7]	Netherlands 2006–2007 (%) [8]	This study 2014–2015 (%)
≤4	59.6	64^a	13.0	10.7	27^a	22.4
5–8	92.9	99^b	25.3	30.4	72^c	55.2
9–12	99.5	–	35.7	59.8	–	75.0

^aAverage prevalences in children 1–4 years old

^b6–7 years old

^c7 years old, retrieved from the text and Figure 3 of Ref. [8]