The detection rates of astrovirus were then analyzed year-wise, which showed a decreasing trend of 1.2% in 2008, 1.7% in 2009, 0.7% in 2010, 0.4% in 2011, and 0.7% in 2012; the exception being the year 2009 where it showed an increase (1.7%).
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The sentences
However, an interesting trend reported in another study stated that the detection of astroviruses was higher in May, June, July, and August than in December, January, and February [ 6 ].