Add Yahoo as a preferred source to see more of our stories on Google. Regulatory T cells (red) interact with other immune cells (blue) and modulate immune responses. National Institute of Allergy and ...

In total, about a quarter of adults in the United States have seasonal allergies, and they can become sensitized over a ...

We often think about our immune system when a breakdown happens—AKA the sniffles start. Sick happens, and nothing can prevent anyone from never, ever coming down with an illness. However, it is ...

The immune system is designed to protect us against viruses and bacteria. In autoimmune diseases, however, the immune system instead attacks the body's own cells. Conditions such as systemic lupus ...

Medically reviewed by Daniel More, MD Key Takeaways Echinacea may lower your risk of catching a cold, while zinc is more ...

Measles can induce immune amnesia, a phenomenon that eliminates acquired immunity to other infectious diseases.

Sat, January 24, 2026 at 2:56 PM UTC The immune system is the body’s natural defense network that helps to keep you healthy from things like bacteria, viruses, and parasites. It’s a complex network of ...

More and more, we’re learning about the havoc that a surplus of histamine can cause in our bodies. Histamine isn’t inherently ...

As the temperature drops and sniffles start making their rounds, we’re all thinking about ways to strengthen our immunity: vitamin C, hand sanitizer, maybe a flu shot. But while you’re focused on ...

One can barely turn on or read the news of the day without being reminded that this flu season is one of the worst in memory. Perhaps you or others you know have had their battle with the illness, and ...

I am lying under a blanket, feeling rough, staring at a bowl of oranges. Every fibre of my being is urging me to devour the lot. I can hear my mum – and medical friends at university – insisting that ...

The body’s defenses may be mildly lowered for about 1 to 4 weeks after a single steroid shot into a joint or near your spine. In some people, particularly with higher doses, this effect may last up to ...