Your ads will be inserted here by
Easy Plugin for AdSense.
Please go to the plugin admin page to
Paste your ad code OR
Suppress this ad slot.
SINGAPORE – Even before the haze is visible, pre-schooler Lucas Zhang seems to sense its presence.
His mother Suwanti Tan says Lucas, six, will have a runny nose, sometimes accompanied by wheezing.
Please subscribe or log in to continue reading the full article. Learn more about ST PREMIUM.