What is biostatistics?

Biostatistics comprises the reasoning and methods for using data as evidence to address public health and biomedical questions. It is a scientific approach and a set of tools for designing studies and for quantifying the resulting evidence, for quantifying what we believe, and for making decisions. Biostatistics is rapidly expanding because of exciting new problems in bioinformatics, genetics, neuroimaging, bioterrorism, environmental science, international health, and health policy.