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Thread: The coronavirus
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Old 02-01-2020, 09:18 PM   #64
46zilzal
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Join Date: Aug 2004
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Once a virus has adequate host numbers infected, it usually begins to mutate and often becomes MORE virulent.

Take, for example, a virus that has a mutation that makes it particularly deadly to its human host and kills the host within a few hours of infection. The virus needs a new, healthy host for its descendants to survive. If it kills its host before the host infects others, that mutation will disappear.

When going through wider and wider number of hosts, it can mutate wildly. Problem with THIS, and MOST virus infections, is that the host is an infective vehicle long before symptoms arise so by the time they are sick, they have already spread the bug widely.

MOST viruses are SPECIES SPECIFIC for it requires similar antigenic cellular surface markers that match the virus in order for it to permeate the cell membrane and then hijack the host reproductive apparatus because viruses cannot replicate by themselves.

Quote: Viruses can infect only certain species of hosts and only certain cells within that host. ... For most viruses, the molecular basis for this specificity is that a particular surface molecule known as the viral receptor must be found on the host cell surface for the virus to attach.
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