Fig. 2

Variation of weather factors and samples positives for rotavirus, norovirus, adenovirus, astrovirus, sapovirus and aichi virus A in children less than 5 years in Ouagadougou, Burkina Faso from November 2011 to October 2012. a Temperature °(C), b Relative humidity (%) and c Rainfall (mm). Positives cases of rotavirus, norovirus, adenovirus and sapovirus correlated with temperature (r = −0.68, r = −0.74, r = −0.68, r = −0.65 respectively). Rotavirus, adenovirus and astrovirus correlated with relative humidity (r = −0.61, r = −0.54, r = −0.51 respectively). No correlation was observed with rainfall