Thus traffic of people and vehicles into the factory without proper hygienic barriers may represent a risk of contamination of the production environment.
This project to ' control water ' always involved a parallel campaign of citizen improvement, that is, to create a ' hygienic instinct ' among the lower classes.
On the surface, colonial hygienic drives seemed to differ little from metropolitan ones.
Calculation of an equitability index revealed that the specific richness was less equitable once socioeconomic conditions and hygienic practices were improved.
Officials in the capital city and the federal government proposed a hygienic program to minimize the degenerative effects of immigration.
Before the outbreak of war, serum hosts were kept under excellent hygienic conditions.
Hygienic conditions are one factor affecting the risk.
A public education programme to improve the hygienic habits of the population might be a higher priority and more cost-effective.
