In term of virus transmission, the vector of transmission is
wide in its array, and those virologist are not concern about the
transmission, they are more concern about the behavorial of the
virus and its origin, once they get origin (root), the virus
will end or die, but because virus is a living organism, it wanted
a share of the sphere in this world as all living thing does except
human, less and less birthrates.
So, to prevent being identify and capture by virologist, it
mutate to survive, and that why you get H1N2, or H7N9 all kinds of
new mutation to mislead other living organism like human or bird
inorder to survive.
There is no way to prevent virus mutation and transmission, we
can only slowing it down and tame it for a period of time, time and
time again, virus mutate, set up their army and start to invade
again, from human to bird to pig or whatever living thing that they
can take as host.
For bird or pigs, human can just destroy it all and that may end
the virus dying together with the host, but for human, you cannot
even kill a person having it.
It is good to know and acknowledge virus present and booming
period, but as global entity in today world, you can hardly said
this safe and that is safe, and nobody knows who is going to hit
first, and if we worry to much, then the best safest way is to stay
at home in a cocoon of your room.