Primary CNS lymphoma is a rare cancer that arises from malignant white blood cells. Affected individuals develop tumors in ...

Progressive multifocal leukoencephalopathy (PML) is a rare but serious brain infection. It gradually destroys brain tissue and often leads to death within a few weeks. It is triggered by human ...

There is a constant war going on in your body. Working against you are viruses and cancer cells growing uncontrollably, threatening your tissues and organs. Fighting on your side are immune cells such ...

The herpes virus is an infection that often causes painful blisters on the mouth and or genitals. Interestingly, the viral infection is common and is associated with cold sores, mononucleosis or ‘mono ...

From the moment they’re born, newborns — or, specifically, their immune systems — must learn to fight germs without harming their own tissues. In a new study, Yale researchers found that one type of ...

Your lymphatic system filters waste, runs your immune defense and has no pump. Here's what doctors say keeps it moving.