SARS apparently might also be transmitted through touching surfaces on which the virus has settled via sneeze droplets or touch by an infected person. These surfaces could include door knobs, benches, train straps, gas pumps, credit cards, shopping bags, elevator buttons, banisters, counter tops, etc. If the virus can live for 24 hours on such surfaces, the risk of such transmission is not minimal if SARS is rampant in the population around you.
If SARS becomes bad in my area, I'll wear a mask when I go out to prevent unconscious contact of my hands with my mouth and nose.
I was overlooking that. Good advice.