Running long distance may weaken immune system

Last week ran almost 13Km at one go, from hougang florida condo to punggol end and from punggol end back to punggol park.
Now i think suffering from some dehydration and weak immune system, developing some flu-like symptoms, sometimes ok , sometimes not ok.

Ok. So that is a lesson for me to reduce my running.

Here are some useful info for preparing for SBR2008, Standchart run 2008.

1)
http://www.runningforums.com/Running_while_sick_t23731.html

2)
http://www.runnersweb.com/running/rw_news_frameset.html?http://www.runnersweb.com/running/rw_training.html

3)
http://forums.runnersworld.com/eve/forums/a/tpc/f/697106477/m/5711007952

Wish everyone best of health
Have a nice day.