On Wed, 16 Nov 2016 01:30:51 +0800, "Mr. Man-wai Chang"
<
toylet...@gmail.com> wrote:
> Then lead was and is a *physical* if not a *chemical* poison?
> Virus are *biological* poison?
A virus is a living creature. (Borderline living, but that's a topic
for a biology group.)
A virus is small enough to pass through filters that stop even the
very smallest bacteria. When researchers first noticed that
communicable diseases could be spread by bacteria-free substances,
they called the mysterious agent a "filterable virus" -- perhaps
generalizing from "poison" to "something harmful". When they finally
got microscopes good enough to show them what the unknown agent was,
the name "virus" stuck. After all, English has "poison" and "toxin"
and can get along quite well without "virus".
Viruses are not affected by antibiotics. Antibiotics are poisons that
affect bacteria more severely than they affect mammal cells.
<digression>
That is why you have to keep taking an antibiotic after symptoms
subside: if you stop too soon, the bacteria that were merely sickened
will perk up and re-populate you with germs that aren't particularly
sensitive to that poison. If you keep them sick for a while, your
immune system will get them.
</digression>
Viruses are simpler than bacteria, and don't, metaphorically speaking,
have the gears that antibiotics throw a monkey wrench into.
--
Joy Beeson, U.S.A., mostly central Hoosier,
some Northern Indiana, Upstate New York, Florida, and Hawaii
joy beeson at comcast dot net
http://wlweather.net/PAGEJOY/
The above message is a Usenet post.
I don't recall having given anyone permission to use it on a Web site.