Edward Jenner

A pioneer in cancer research who supports the theory that some cancers are caused by a virus.

Daniel Hale Williams

Louis Pasteur

Identified the virus, HIV that causes AIDS.

Performed the first surgeries under sterile conditions.

Howard Taylor Ricketts

Dr. Robert Gallo

Robert Koch

Flossie Wong-Staal

Discovered penicillin.

Developed a vaccine for polio.

Showed that infections in open wounds come from bacteria.  He developed sterilization techniques.

Invented a process that uses heat to kill bacteria in milk.

Robert Hooke

Showed that bacteria can be cultured, or grown, in a material called agar.

Used a microscope to examine objects in nature

Jonas Salk

Carlos Finlay

A research biologist who is working to make a drug that will prevent HIV from reproducing

Discovered that ticks spread Rocky Mountain spotted fever.

Fannie Hess

Discovered a way to prevent people from getting smallpox

Joseph Lister

Sir Alexander Fleming

Discovered the tuberculosis bacillus

Jane Wright

Discovered that mosquitoes transmit the virus that causes yellow fever.