Translate the following English sentence to French:
"However, we should never blind ourselves to scientific research, we should never cease to gather information, we should never cease to explore improvements in existing systems and, if necessary, we should at least consider policy changes."
Cependant, nous ne devrions pas ignorer la recherche scientifique, nous ne devrions cesser de réunir des informations, nous ne devrions cesser de tenter d'améliorer les systèmes existants et, si besoin est, nous devrions au moins envisager de modifier nos politiques.