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  1. An antigen is a foreign protein (such as bacteria or virus). I called it foreign because it is not a normal part of your body. Your cell membranes are designed to recognize that those substances are foreign...

    3 Answers · Science & Mathematics · 28/07/2009

  2. I'm pretty sure its mutations, mutations create the new species.

    1 Answers · Health · 13/11/2011

  3. ...) titers are also seen in chronic infection (and in acute infection ). Only with immunity due to natural infection that has resolved, or with immunity due to immunization...

    4 Answers · Health · 15/03/2014

  4. If you have an infection , your immunity system is fighting it and your body...a larger area, get to a doctor quickly. An infection can cause a lot of damage to different parts of the body...

    1 Answers · Health · 02/05/2011

  5. ... 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

  6. Immunity is the ability of the body to resist an infection of pathogen by producing a specific antibody. A...of serum containing antibodies to acquire immunity . VACCINE is a suspension of bacteria...

    2 Answers · Science & Mathematics · 12/10/2011

  7. Streptococcus aureus lives on your body (it's kind of like Escherichia coli, lives with you, but can also make you sick). It is an opportunistic pathogen, meaning, if you're already sick, it will take advantage of the immune system...

    6 Answers · Health · 12/12/2007

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

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

  9. Vitamin C (ascorbic acid). The naturally occuring one is better than the tablets. Take lots of citrous fruits

    11 Answers · Health · 22/02/2007

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