Deep Dive - Who is to blame for food poisoning outbreaks in Singapore?

Cases of people falling seriously ill after eating contaminated food have been in the spotlight. Why does severe food poisoning happen and are caterers the only one to clean up their act? Steven Chia and Crispina Robert speak to Dr Richard Khaw, deputy director of the School of Applied Sciences at Nanyang Polytechnic and Chris Loh, creative director of Purple Sage and Rasel Catering.