Nobel Media AB
The Nobel Prize: Nobel Prize in Physiology or Medicine 1905 Presentation Speech
This site from the Nobel e-Museum contains a speech, originally given in 1905, in which Count K.A.H. Morner praises Robert Koch for his contribution to the world of medicine and awards Koch with the Nobel Prize.
CK-12 Foundation
Ck 12: Biology: Control of Viruses
[Free Registration/Login may be required to access all resource tools.] Describes how viruses can be controlled by vaccines and antiviral drugs.