Not that I have a monopoly on information or anything, but I live in Singapore and this comment is possibly the first time I have ever heard this guy's name.
chair of the National Infection Prevention and Control Committee through the Ministry of Health, Singapore (2013 -),)
To the rest of the world, he is the face of Singapore's Covid response. Based on what I've read he was influential (behind the scenes perhaps?) in Singapore's response...and the reason why your government didn't require masks till after your flare up.
His advice seems to have been taken very seriously in other countries (not requiring masks, not closing schools).