Yes, the Spanish Flu was worse. But it also had two runs through the US over about a year. Where will be a year from now with SARS? It's the potential of the disaster that's frightening, not what's happened so far.
We have a far better research and medical system, than was available in 1918. Thus far, SARS isn't spreading andwhere near as rapidly, as the Spanish flu did.
Do you enjoy scaring yourself so, over something that you have little to no control over and which shows NO signs of being an huge pandemic ? Want something to REALLY worry about ? Worry about the East Nile virus or Lyme disease, which you have a far better chance of getting and dying / being a valetutinarium from .