He was in the police during national service and had to drive during the midnight shift. After nearly falling asleep at the wheel several times, Mr Loo Jun Wen, 21, realised how easy it was for motorists to doze off.

Fancy a wrist device that warns you if your current location makes you a prime target for mosquitoes, an ever-present concern with viruses like dengue fever and Zika?

He was in the police during national service and had to drive during the midnight shift. After nearly falling asleep at the wheel several times, Mr Loo Jun Wen, 21, realised how easy it was for motorists to doze off.