The day is etched in her memory. Ms Crystal Goh woke up one morning in April 2011 and could not muster a decipherable word.
"It sounded like I was having a very bad sore throat. Like I was being strangled," she said. "People couldn't understand me when I spoke."
Already a subscriber? Log in
Read the full story and more at $9.90/month
Get exclusive reports and insights with more than 500 subscriber-only articles every month
ST One Digital
$9.90/month
No contract
ST app access on 1 mobile device
Unlock these benefits
All subscriber-only content on ST app and straitstimes.com
Easy access any time via ST app on 1 mobile device
E-paper with 2-week archive so you won't miss out on content that matters to you