Scientists at Imperial College London have identified a protein that triggers rheumatoid arthritis.

Rheumatoid arthritis is an incurable immune system disease where joints are swollen by inflammation.
The body uses inflammation as a defense against infection and tissue damage, but too much is harmful.
Blocking the production of IRF5 could help in a range of diseases including RA, lupus and even MS.
"This is really exciting," said senior researcher Irina Udalova.
Source-ANI