This way handling i agree,cause u should hv seen pll no wear bus ,bus driver never stop them still allow them board bus,maybe ftom same hometown in malaysia, Mrt ppl don wesr mask enter mrt station ,Mrt station ppl sleeping or from same kampong, walk in like big boss , some wear mask go into mrt , take off mask n don wear in train,when c officer cone put on, knn ,really jialat ,they thought mask we use is super mask. If thst person sick ,it will spread to many in buse n mrt.