Chronic and viral infections can literally exhaust certain key cells in the immune system from a constant barrage of attacks.

Among healthy adults receiving the JN.1- or KP.2-adapted mRNA seasonal COVID-19 vaccine, neutralizing antibody responses were similar.

One receptor can protect antibodies from degradation, extend their half-life and become a drug target itself. Explore the ...

Louse-borne relapsing fever is an acute bacterial infection that triggers recurring episodes of high fever. It is caused by the spirochete Borrelia recurrentis, which is a spiral-shaped bacterium ...

Louse-borne relapsing fever is caused by the spirochete bacterium Borrelia recurrentis, which is transmitted by body lice (not head lice). The disease was first described by Hippocrates (460-370 BC).

As the immune system weakens with age, scientists have found a way to restore some of its lost strength. By delivering mRNA to the liver, they created a temporary source of immune-boosting signals ...

The immune system is the frontline protection against infection, continually searching for and destroying unknown pathogens. While typical operation of the immune system scans for threats, some ...

Dozens of new discoveries reveal that defenses evolved by bacteria and viruses billions of years ago still define our own innate immune system. Evolutionary arms races — where one species is pitted ...

Evidence is mounting that long covid can be caused by the immune system attacking the body. The results of four studies add to the idea that autoimmunity, in which the immune system damages healthy ...

Gut bacteria aren’t just passive passengers—they can actively send proteins straight into our cells. Using microscopic injection systems, even harmless microbes can influence immune responses and ...

You contain multitudes. Within you there are billions of defenders, ready to protect your health from threats arising both outside and inside your body. This is your immune system, and it consists of ...