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Table 4 The size and direction of movement during the EV epidemic in 2008

From: Spatio-temporal analysis on enterovirus cases through integrated surveillance in Taiwan

Date Ellipse size of the epidemics Moving direction of the center (Y axis)
Mild EV Severe EV Mild EV Severe EV
  XStdDist (m) YStdDist (m) XStdDist (m) YStdDist (m)   
Apr-08 117475.15 273726.81 60763.89 232460.24 - -
May-08 154384.39 264808.86 70947.83 239600.52 7881.29 20605.32
Jun-08 178337.48 271730.16 73179.24 247525.28 9265.09 29547.7
Jul-08 149327.52 270119.86 88125.03 204859.63 1845.9 -45949.13