Knowledge of hepatitis B and vaccination status of some expatriate ethnic groups of blue collar workers in northern saudi arabia.

Objective: To find out the level of knowledge and vaccination status of some expatriate ethnic groups of blue color workers.

Background: Hepatitis B (HBV) infection is relatively common throughout the world, but more prevalent in low socioeconomic and underprivileged classes. The chronic infection may lead to severe consequences including Hepatocellular carcinoma (HCC).