Some quick factoids of past flu pandemics:

The Spanish flu pandemic of 1918 remains the most devastating outbreak of modern times - infecting up to 40% of the world's population and killing more than 50m people, with young adults particularly badly affected.

In 1957 the Asian flu killed two million people. Caused by a human form of the virus, H2N2, combining with a mutated strain found in wild ducks. The elderly were particularly vulnerable to this flu.

A 1968 outbreak first detected in Hong Kong, and caused by a strain known as H3N2, killed up to one million people globally, with those over 65 most likely to die

Is this 2009 Mexican Swine Flu going to get as bad as the ones listed above? I think we will all know in the next week or two. What are your thoughts? Are you worried about this outbreak of swine flu?

Sources: BBC