About Swine
Flu
Although the
name 'swine flu' brings up a lot of extra fear and worry, it is
important to note that swine flu is just an influenza A H1N1 virus.
That means
that it is just another type of flu virus, just like that causes
our typical seasonal flu symptoms. The big difference is that
the current swine influenza A (H1N1) virus has components of pig
and bird influenza viruses in it, so that humans don't have any
immunity to it. That makes it more likely to become a pandemic
virus (have the ability to cause a global outbreak) if it can
easily spread from person-to-person.
Like people,
pigs can get influenza (flu), but swine flu viruses aren't the
same as human flu viruses. Swine flu doesn't often infect people,
and the rare human cases that have occurred in the past have mainly
affected people who had direct contact with pigs. But the current
"swine flu" outbreak is different. It's caused by a
new swine flu virus that has changed in ways that allow it to
spread from person to person -- and it's happening among people
who haven't had any contact with pigs. That makes it a human flu
virus. In an effort to avoid confusion, the CDC is calling the
virus "novel influenza A (H1N1) virus" to distinguish
it both from flu viruses that infect mainly pigs and from the
seasonal influenza A H1N1 viruses that have been in circulation
for many years.