Why can the human immune system often remember a vaccination for a whole lifetime? Researchers at ...

Your immune system may be weak if you have frequent, severe, or extended infections. Learn more signs of a weak immune system.

Scientists have uncovered an elegant biophysical trick that tuberculosis-causing bacteria use to survive inside human cells, ...

During the recent Covid-19 pandemic, the rate of serious illness and death was jarringly high in older populations. Why? Weakening immune systems — as we age, we become more vulnerable to infections, ...

Pain is something most people experience after an injury, whether from a sprained ankle, surgery or car accident. Normally pain fades as the body heals. But it may last longer in women than in men, ...

When food is scarce, stress hormones direct the immune system to operate in "low power" mode to preserve immune function while conserving energy, according to researchers at Weill Cornell Medicine.