Volume 15, Number 9—September 2009
Who is this man?
Image courtesy of David M. Morens
Here is a clue: he discovered that epidemic typhus is transmitted by lice. Who is he?
A) Charles-Jules-Henri Nicolle
B) Stanislaus Joseph Matthias von Prowazek
C) Howard Taylor Ricketts
D) Henrique da Rocha Lima
E) Hans Zinsser
Decide first; then: