Bias

Deviation of results or inferences from the truth, or processes leading to such systematic deviation. Any trend in the collection, analysis, interpretation, publication, or review of data that can lead to conclusions that are systematically different from the truth.

Source: CDC Glossary of Epidemiologic Terms 

Epidemiological studies - Exposure assessment(s)

Español: Sesgo
Français: Biais

Power lines

Water Disinfectants

Tobacco

Climate Change

Ozone