Table 4.
Results of the clustered lot quality assurance sampling surveys*to monitor yellow fever vaccination coverage before the end of the campaign, Sierra Leone, 28–29 November 2009
| District | Lot | N |
Vaccination Card§ |
Verbal History |
||||
|---|---|---|---|---|---|---|---|---|
| U | D | SE | U | D | SE | |||
| Western Area Rural |
1 |
50 |
2 |
A |
0.02 |
1 |
A |
0.02 |
| Western Area Urban |
2 |
50 |
4 |
A |
0.05 |
4 |
A |
0.05 |
| Kambia |
3 |
50 |
0 |
A |
0.00 |
0 |
A |
0.00 |
| 4 |
50 |
0 |
A |
0.00 |
0 |
A |
0.00 |
|
| District Total |
100 |
0 |
A |
0-00 |
0 |
A |
0.00 |
|
| Koinadugu |
5 |
50 |
6 |
A |
0.06 |
4 |
A |
0.05 |
| 6 |
50 |
10 |
R |
0.07 |
8 |
R |
0.08 |
|
| District Total |
100 |
16 |
R |
0.05 |
12 |
A |
0.05 |
|
| Port Loko |
7 |
50 |
18 |
R |
0.19 |
14 |
R |
0.17 |
| 8 |
50 |
7 |
A |
0.12 |
7 |
A |
0.12 |
|
| 9 |
50 |
11 |
R |
0.09 |
7 |
A |
0.04 |
|
| District Total |
150 |
36 |
R |
0.08 |
28 |
R |
0.07 |
|
| Tonkolili |
10 |
50 |
2 |
A |
0.02 |
1 |
A |
0.02 |
| 11 |
50 |
2 |
A |
0.02 |
2 |
A |
0.02 |
|
| 12 |
50 |
1 |
A |
0.02 |
0 |
A |
0.00 |
|
| District Total | 100 | 5 | A | 0.01 | 3 | A | 0.01 | |
N: sample size; U: number of Unvaccinated in the sample; D: Decision; A: Accepted; R: Rejected; SE: Standard Error of the distribution of the vaccination variable between the clusters in the lots.
* Sampling plans used: UT = 90% and LT = 75%, with d = 7 when N = 50 (5x10); d = 15 when N = 100 (10x10); d = 25 when N = 150 (15x10).
§ Used to take operational decisions in the field before the end of the campaign.