.
Sir Alexander Fleming
Anton Van Leeuwenhoek
Hippocrates
Ben Carson
Anton Van Leeuwenhoek
Hippocrates
Wilhelm Roentgen
Jonas Salk and Albert Sabin
Ben Franklin
Edward Jenner
Robert Koch
Joseph Lister
Ben Franklin
Louis Pasteur
Christian Barnard
Francis Crick and James Watson
Rene Laennec
Joseph Lister
Sigmund Freud
Sir Alexander Fleming
Rene Laennec
Elizabeth Blackwell
Claud Bernard
Florence Nightingale
Boris Yegorov
Florence Nightingale
Elizabeth Blackwell
Anton Van Leeuwenhoek
Florence Nightingale
Elizabeth Blackwell
Clara Barton
Boris Yegorov
Robert Koch
Louis Pasteur
Sigmund Freud
Ben Carson
Christian Barnard
Jonas Salk and Albert Sabin
Joseph Lister
Dr. George Nicholas Papan Icolaau
Clara Barton
Florence Nightingale
Elizabeth Blackwell
Boris Yegorov
Wilhelm Roentgen
Robert Koch
Ben Carson
Claus Bernard
Sigmund Freud
Ben Carson
Dr. George Nicholas Papan Icolaau
Wilhelm Roentgen
Jonas Salk and Albert Sabin
Sigmund Freud
Ben Carson
Ben Franklin
Jonas Salk and Albert Sabin
Edward Jenner
Hippocrates
Christian Barnard
Robert Koch
Sir Alexander Fleming
Edward Jenner
Francis Crick and James Watson
Christian Barnard
Ben Carson
Edward Jenner
Robert Koch
Jonas Salk and Albert Sabin
Francis Crick and James Watson
Sir Alexander Fleming
Ben Carson
Boris Yegorov
Dr. George Nicholas Papan Icolaau
Sir Alexander Fleming
Elizabeth Blackwell
Ben Carson
Louis Pasteur
Boris Yegorov
Edward Jenner
Claud Bernard
Joseph Lister
Wilhelm Roentgen
Christian Barnard