In addition, many initiatives naturally have had other programs that occur simultaneously with the spraying campaigns.  These include activities such as health education and structural improvements to the housing.  Improving the housing situation became an obvious way to try and combat the triatomine bugs given that they lived in the cracks of the run-down huts.  The WHO suggested that improvements, even as small as replacing the roof and or plastering over the walls to eliminate cracks, would be very helpful in reducing the possibility of the bug infestation.  Therefore, it made sense that �chemical control complemented house improvement and vice versa� (WHO, 70).