The Nobel Prize in medicine goes to 3 scientists for key immune system discoveries

AP Photo/Jacquelyn Martin, File

Claudio Bresciani/TT News Agency via AP

AP Photo/Lee Jin-man, File

Kyodo News via AP

Kyodo News via AP

Claudio Bresciani/TT News Agency via AP

Shohei Miyano/Kyodo News via AP

Shohei Miyano/Kyodo News via AP

AP Photo/Louise Delmotte

AP Photo/Louise Delmotte

AP Photo/Lindsey Wasson

AP Photo/Louise Delmotte

AP Photo/Lindsey Wasson

AP Photo/Lindsey Wasson

Sonoma Biotherapeutics/Shohei Miyano/Kyodo News, Lindsey Wasson via AP

Yu Nakajiyama/Kyodo News via AP ( 1 /16)

STOCKHOLM (AP) — Three scientists won the Nobel Prize in medicine Monday for discoveries about how the immune system knows to attack germs and not our own bodies.

The work by Mary E. Brunkow, Fred Ramsdell and Dr. Shimon Sakaguchi uncovered a key pathway the body uses to keep th