Saw at the rooftop of VivoCity. Singa the Courtesy Lion wears a mask.
It's not the culture in Singapore to wear a mask when you are not feeling well.
It's very very rare to see someone wears a mask, unless you are in a clinic or hospital. There's a stigma with masks and it's hard to convince people.
I wore one last week, just for like 10 mins only. ;-p