Many scientists do not think viruses are
alive. A virus cannot grow or move by
itself. And to make copies of itself, it has to
be inside a living creature, called a host.Once it is inside a
host, the virus invades
a cell and forces it to
make more viruses.
The new viruses
burst out of the
cell, leaving it
dead or very
weak. Each
new virus
then invades
another cell.If you’re the host,
millions of viruses soon
spread through your
body, making you feel
sick. Antibiotics won’t
help. Medicines
called vaccines
can—but only if
you get them
before you
get ill.But antibiotics do not
work against viruses.viruses are even Most kinds of
tinier than bacteria. They come in lots
of shapes too.
looks like a robotYikes! That one
with spider legs!