Pre

Post

Utmost

Moderate

High

Utmost

Moderate

High

Positive cases

3

3

3

6

2

2

Negative cases

20

17

18

17

18

19

Total

23

20

21

23

20

21

Positive rate

13.04%

15.00%

14.29%

28.57%

10.00%

9.52%