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Research & Human Health  Biomedical Discoveries Underpin Good
Health  Medical exam  Virtually every major medical breakthrough
in the past half-century has been achieved because a biomedical
scientist unraveled one more mystery of biology.   The
discoveries of Johns Hopkins scientists have led to vaccines
that prevent infectious diseases and even some types of cancer,
sophisticated genetics-based tools for diagnosis and prevention
of a range of conditions, promising new treatments for
developmental diseases and neurological disorders, and the
knowledge that cruciferous vegetables can help protect us from
cancer and degenerative diseases.  Over the past decade,
advances in molecular biology, genetics, and instrumentation
have made it possible to address complex questions that earlier
seemed far out of reach.  We now have the means to look at
complex interactions among genes, as well as the interplay
between environment and genetic variation.  How do