It's gonna depend on where your training was before you got sick. If you have been doing a bare minimum amount of training, the week off is gonna take a biggish chunk out of your race. If you've been logging some really good quality miles, it'll still take a chunk out of your race, but probably not much.

If you're fully recovered, either take the week you missed as a mulligan and move on to the next week or try to pick up where you left off.

How long have your long runs been and what kind of weekly mielage have you been running?

Edited to add: are you really in Hong Kong? I've been there a few times, but before I was a runner. It's a really amazing place and would consider it to be one of my dream runs to rack up an 8-10 mile run through the streets of Honk Kong. Heck, I probably wouldn't even get too freaked out when I got lost after running 800 yards.

http://This message has been edited by mrinertia (edited Nov-17-2007).