Table 1

Number of cases selected as emergent, as a function of radius distance (V) and elapsed past time without cases (T).

T

V

10

20

30

40

50

60

70

80

90

100

150

200

300

400

500

7

687

389

256

185

142

115

87

75

61

55

35

28

18

13

11

14

555

318

195

133

102

78

62

54

48

41

27

21

12

8

5

21

489

291

176

118

89

72

54

46

40

34

22

16

15

7

4

28

446

262

152

100

77

60

48

39

36

32

22

16

11

5

4

60

525

237

131

86

67

52

42

36

31

27

16

15

8

7

4

90

504

236

129

84

68

52

42

33

31

27

16

14

8

7

4

Parameters values are expressed as: T = time by days and V = distance in kilometers.

Souris et al. International Journal of Health Geographics 2010 9:3   doi:10.1186/1476-072X-9-3