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  1. ...of the person receiving the protection from disease does not fight off the infection. Active immunity can be natural (occurs without human intervention) when a person catches a...

    1 Answers · Science & Mathematics · 11/07/2010

  2. It isn't going to happen for influenza because the virus undergoes a change precluding recognition by the immune system nearly every season. As for the "common cold", there are myriads of viral species and subspecies(variants) in the...

    2 Answers · Science & Mathematics · 09/08/2013

  3. A- immunity due to memory cells recognizing the antigen on the pathogen.

    2 Answers · Science & Mathematics · 06/06/2010

  4. ... infected, the immune system must sacrifice it, and destroy it before infection spreads. HUMORAL IMMUNITY: When humoral immunity is needed (for organisms that live...

    2 Answers · Science & Mathematics · 04/04/2008

  5. ...the TB germ and the host are fairly evenly matched. The infection is walled off and cell-mediated immunity develops. The PPD test becomes positive, but no ...

    2 Answers · Science & Mathematics · 20/01/2011

  6. ...infections we had. There are certain diseases that confer post-infection immunity but most do not- which food infection is just one of them. Since...

    6 Answers · Science & Mathematics · 04/07/2007

  7. ...from it again. There are exceptions in everything. Immunity is acquired by human body against the communicable or infection-type diseases only. All the Vaccines work on these...

    4 Answers · Science & Mathematics · 05/05/2009

  8. immunity the condition of being immune; the protection against infectious disease conferred either by the immune response generated by immunization or previous infection or by other nonimmunologic factors. resistance the natural ability of an organism to resist microorganisms or...

    7 Answers · Science & Mathematics · 20/07/2008

  9. ..., inhibits the progression of group B streptococcal arthritis. Infection & Immunity. 72(11):6367-72, 2004 Nov. - Mirshafiey A. Chitsaz...

    3 Answers · Science & Mathematics · 26/02/2007

  10. ... after multiple bouts of the disease. A person develops enough immunity to prevent severe infection and mortality, but can still become ill. Moreover, even this limited immunity...

    4 Answers · Science & Mathematics · 19/05/2007

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