From minimalist wrist designs to full sleeves, body art has become so common that it barely raises an eyebrow. But while the personal meaning of a tattoo may be obvious, the biological consequences ...

From childhood coughs and colds, through meningitis B in teens and shingles in older people, here’s how our immunity to different diseases changes over time ...

How does the same infection, say the flu or a cold, give some people mild symptoms and leave others suffering? Why do people develop autoimmune diseases? And will we ever be able to predict when—and ...

Every day, your immune system performs a delicate balancing act, defending you from thousands of pathogens that cause disease while sparing your body’s own healthy cells. This careful equilibrium is ...

We often judge our immune systems based on how many colds we catch in a year, but experts say that’s an oversimplification of what is a highly complex network of cells, tissues and organs that works ...

Researchers found that missing a single night of sleep can quickly affect key parts of the immune system. The study found important immune cells became overactive after sleep loss. Researchers say ...