Yup, sad to say, I'm also recovering from a bad bout of bronchitis ; after having pushed the limit participating in a recent triathlon (swimming) despite being in compromised state. Certainly, will be better to forego this half marathon and pass it to the regulars than waste it. Incidentally, this is one of Singapore's annual race event ; Standard Chartered Marathon, some of you who are passing this way may want to mark this on your calendar next year
http://www.singaporemarathon.com/en/