00:01
A really interesting question which
you may be thinking about, certainly lots
of people do, is: Are viruses alive? I posted
this on my blog a number of years ago and
it always gets a lot of activity. So let's
see what the results have been so far. So
are viruses alive? Yes, 1600 votes; no, 1700
votes; something in between, 1600 votes; and
I don't know, 250 votes. So you can see people
are pretty divided among yes, no, something
in between. So people really don't understand
what viruses are. But I've thought about this
problem for many, many years and really just
a few years ago I came up with what I think
is a good answer and let's see if you believe
it as well. I think a virus is an organism
that has two phases. Now you can sort of think
of it as a seed and a plant, a virus has a
phase which is a virus particle. There is
a virus particle that can go from host to
host, get inside the cells of the host and
reproduce. The virus particle itself can't
be living, it's just nucleic acid and protein,
maybe a membrane, it's an inert particle.
So I don't see how this could be living, but
it certainly has the potential to live and
that potential is realized when the virus
gets inside of a cell. So that's the second
phase of a virus lifecycle, the infected cell.
01:31
The infected cell, the virus gets into the
cell, it redirects all the processes of the
cell to make more virus particles. That is
certainly living, but the virus particle part
is not. So when you say virus, you're not
just talking about the virus particle, you're
talking about this organism with two phases,
and so there you can really answer the question:
Are viruses alive?