Stay off the MRT if possible, it is a confined space packed with human sardines, with potential for infection if a carrier is on board.
If you are so panaroid about this, wear a surgical mask, put on the blue coloured plastic surgical 'rain coat', wear disposables gloves, bring along a bottle of 'dettol cleanser', a bottle of Methylated Spriirit,; clean your self, every time you touches something.
or take a cab..or drive a car...only you, or you with the driver, or you the driver with others...
Don't worry lah!...you are in capable hands...WKS, 'Cow'...you are rest assure that you are SAFE!