Jan 3, 2026 · The immune system is a group of defense responses found in humans and other advanced vertebrates that helps repel disease-causing entities. Immunity from disease is …

The immune system protects its host from infection with layered defenses of increasing specificity. Physical barriers prevent pathogens such as bacteria and viruses from entering the organism. …

Your innate immune system is part of your body’s first-line defense. It responds to invaders right away by attacking any organism that shouldn’t be in your body.

The immune response is how your body recognizes and defends itself against bacteria, viruses, and substances that appear foreign and harmful.

Sep 15, 2025 · “Immunity is a complex response that is broadly divided into two phases: innate immunity and adaptive immunity,” says Shruti Sharma, assistant professor of immunology at …

Mar 11, 2025 · If it detects an unwanted substance, it will mount an immune response — a complex attack to protect the body from invaders like bacteria, viruses, fungi, and parasites.

Apr 17, 2025 · In this article, we will journey through the layers of the immune system, explore the choreography of an immune attack, uncover the secrets of immunological memory, and …

Jul 20, 2025 · The immune response is the body’s defense system against substances that appear foreign and harmful, such as bacteria, viruses, fungi, and toxins. This system is …

Antigens are any substances that the immune system can recognize and that can thus stimulate an immune response. If antigens are perceived as dangerous (for example, if they can cause …

The immune system mounts a response against pathogens as they infect an individual and replicate. The response includes both an immediate innate response and a slower adaptive …