Weeks

Blocks

Mean Disease Incidence

1

2

3

4

5

6

7

8

9

10

3

3

3

3

3

3

3

3

3

3

44.4c

52.8bc

63.9ab

63.9ab

72.2ab

72.2ab

77.8a

75.0a

77.8a

77.8a