| Cabañas |
| Month |
Number of new
outbreaks in month |
Total number of
outbreaks in month |
| 10/1997 |
1 |
1 |
| Annual total |
1 |
|
| Chalatenango |
| Month |
Number of new
outbreaks in month |
Total number of
outbreaks in month |
| 11/1997 |
1 |
1 |
| Annual total |
1 |
|
| Cuscatlán |
| Month |
Number of new
outbreaks in month |
Total number of
outbreaks in month |
| 11/1997 |
2 |
2 |
| Annual total |
2 |
|
| La Libertad |
| Month |
Number of new
outbreaks in month |
Total number of
outbreaks in month |
| 04/1997 |
3 |
3 |
| 05/1997 |
1 |
1 |
| 09/1997 |
2 |
2 |
| 11/1997 |
1 |
1 |
| Annual total |
7 |
|
| San Miguel |
| Month |
Number of new
outbreaks in month |
Total number of
outbreaks in month |
| 08/1997 |
1 |
1 |
| 11/1997 |
1 |
1 |
| Annual total |
2 |
|
| San Vicente |
| Month |
Number of new
outbreaks in month |
Total number of
outbreaks in month |
| 10/1997 |
1 |
1 |
| Annual total |
1 |
|
| Santa Ana |
| Month |
Number of new
outbreaks in month |
Total number of
outbreaks in month |
| 10/1997 |
2 |
2 |
| 11/1997 |
1 |
1 |
| Annual total |
3 |
|
| Usulután |
| Month |
Number of new
outbreaks in month |
Total number of
outbreaks in month |
| 08/1997 |
6 |
6 |
| 09/1997 |
1 |
1 |
| 11/1997 |
2 |
2 |
| Annual total |
9 |
|
|
|