The ancient and modern olympics

Did you know that in the Beijing olympics there were 50 events? Also, the U.S. won 110 medals! Including 36 gold medals! But I'd like to know how many athletes we had? But, there have been other olympics there were many olympics in Greece over a thousand years ago. At first there were only a few events in the olympics. Unlike todays as I said ealier. 

how viruses spread to people

How is a virus like bird flu spread from a bird to a person? Is it buy a bite, bodily fluids, or just the virus spreading through the air? Also does the virus spread throughout the bloodstream immediately  or does it stay in one area and reproduces first?

http://en.wikipedia.org/wiki/Avian_influenza