You've been through winter lurgies and escaped the start of spring free of hay fever. Now you wake up with a sniffle you ...

Researchers say “sickness behavior” mimics mild depression as immune cytokines signal the brain to conserve energy, making people listless and withdrawn. Yet it differs from true depression and varies ...

The man’s symptoms were intermittent, and he lived with them for years. Then he got scared enough to seek help.