The Northwestern University researcher took part in a study that found a way to turn off the immune system in mice with arthritis.

VOA: special.2010.03.16

And today, Jan is a pioneer in the study of the immune system and the treatment of inflammatory diseases like arthritis.

WHITEHOUSE: President Obama Honors the Country's Top Innovators and Scientists of 2011 | The White House

Disease-causing germs, which grow and spread on showerheads, can potentially cause threats to people with a weakened immune system, a new study by the National Academy of Sciences found.

CNN: Vital Signs health tips

Outside the brain, stress can wreak havoc on the immune system, according to another study to be presented at the meeting.

FORBES: Stress Can Shrink Your Brain