About 21,500,000 results
Open links in new tab
  1. Immunity Types | Vaccines & Immunizations | CDC

    Jul 30, 2024 · Active immunity results when exposure to a disease organism triggers the immune system to produce antibodies to that disease. Active immunity can be acquired through natural immunity or …

  2. Active and Passive Immunity: What’s the Difference? - WebMD

    Jul 6, 2025 · Active immunity is more common in our bodies than passive immunity. Our individual immune systems build up active immunity instinctively as we’re exposed to new bacteria and strange...

  3. Types of Immunity | Children's Hospital of Philadelphia

    Individuals rely on active immunity more so than passive immunity. Active immunity is created by our own immune system when we are exposed to a potential disease-causing agent (i.e., pathogen).

  4. Active vs Passive Immunity – Definition and Differences

    Dec 31, 2023 · Active immunity occurs when you make antibodies, while passive immunity is when you are given antibodies. Active and passive immunity are two fundamental types of immune responses …

  5. Physiology, Active Immunity - StatPearls - NCBI Bookshelf

    Aug 14, 2023 · Active immunity functions as an additional immunologic defense to eliminate infective pathogens from the body. The process is more energy-intensive compared to the innate immune …

  6. What Is Passive and Active Immunity? - Biology Insights

    Aug 18, 2025 · Active immunity results from the body’s own immune response to an antigen, leading to the production of antibodies and memory cells. This process builds long-lasting protection, often …

  7. Active Immunity - Definition, Types, Mechanism, Clinical Significance

    Active immunity is a crucial aspect of the human immune system that enables long-term protection against specific pathogens. It involves the activation of the adaptive immune system in response to …

  8. Active vs. Passive Immunity: What’s the Difference?

    Mar 30, 2025 · When we breathe in new air, eat new food or touch unfamiliar things, the natural, active immunity in our bodies usually springs into action. The active immune response can take days or …

  9. Active vs Passive Immunity: Differences and Definition

    Dec 18, 2023 · Active immunity is defined as immunity to a pathogen that occurs following exposure to all or part of that pathogen. When the body is exposed to a novel disease agent, a cascade of …

  10. Immunity (medicine) - Wikipedia

    Immunity (medicine) In biology, immunity is the state of being insusceptible or resistant to a noxious agent or process, especially a pathogen or infectious disease. Immunity may occur naturally or be …