If you are starting research on a topic or issue that is unfamiliar to you, a fast and easy way to build basic familiarity is to consult a resource that provides an overview of the topic or issue. An overview can inform you about different aspects of a topic and provide you with ideas about how to narrow or broaden your research focus. An overview may also introduce you to new vocabulary and key resources. There are a number of excellent resources in Medicine, Nursing, and Allied Health.
Specialized online encyclopedias can provide you with a quick, basic overview.