A protein made by gut cells helps to destroy harmful bacteria in the intestines, according to experiments in mice 1. Roughly 50 proteins in the blood make up the complement system, which forms a ...

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, ...

The newborn's immune system is a highly specialized mechanism that takes months to mature and become capable of effectively responding to pathogens. During this phase, adequate nutritional support, ...

Changes to serum proteins could be behind the debilitating condition known as long COVID. The findings, published in the journal Science, could pave the way for diagnosing and treating the disease.

Most people infected with the SARS-CoV-2 virus recover after the acute illness. However, a significant proportion of infected individuals develop long-lasting symptoms with a wide range of ...

University of Pennsylvania researchers have found a promising new treatment for periodontitis using a component of the immune system called complement, according to a new study in the Journal of ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Want to know how to boost your immune system? First, it’s helpful to understand how it works and ...

Chelsea Rae Bourgeois is a health writer and registered dietitian nutritionist with over eight years of experience in the clinical setting. Her writing covers nutrition and overall health topics, ...

The human body’s defensive lineup is impressive—from made-to-order antibodies to natural-born killers. Here’s how it wards off sickness in every season. When pathogens invade our bodies—in the form of ...