Stress, anxiety and sleepless nights do more than erode peace of mind — they can also weaken the body's defenses, making people more susceptible to infections, cancers and autoimmune disorders. Now, scientists have uncovered a potential mechanism that may link these psychological factors and immunity issues.
In a new study, published Dec. 10 in the journal Frontiers in Immunology, researchers zeroed in on a type of immune cell called natural killer (NK) cells that may play a key role.
