Quote:
Originally Posted by EukerVoorn
This is all true but you're forgetting one thing and that is humans don't get exposed to something from time to time, their immune system gets lazy and loses natural resistance against that particular virus, and viruses develop over time.
I think it's good, the world is over populated, we can use a few nasty viruses.
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The word you're looking for is 'mutable,' viruses are highly mutable - often changing their surface proteins so that whatever antibodies you have that are specific for recognizing the original protein coat are no longer effective against the newer strains. This is a major reason why effective HIV drugs have been so long coming (HIV is EXTREMELY mutable), and also the reason why it is encouraged to get flu shots every year as the vaccine changes to target newer strains.
However, the plague is caused by a bacteria,
Y. pestis, and not a virus.